diff --git a/README.md b/README.md
index a520f83..04d2502 100644
--- a/README.md
+++ b/README.md
@@ -25,9 +25,9 @@ composer require coduo/php-humanizer
 ```php
 use Coduo\PHPHumanizer\StringHumanizer;
 
-echo StringHumanizer::humanize('field_name'); // "Field Name"
-echo StringHumanizer::humanize('user_id'); // "User"
-echo StringHumanizer::humanize('field_name', false); // "field name"
+StringHumanizer::humanize('field_name'); // "Field Name"
+StringHumanizer::humanize('user_id'); // "User"
+StringHumanizer::humanize('field_name', false); // "field name"
 ```
 
 **Truncate**
@@ -39,10 +39,10 @@ use Coduo\PHPHumanizer\StringHumanizer;
 
 $text = 'Lorem ipsum dolorem si amet, lorem ipsum. Dolorem sic et nunc.';
 
-echo StringHumanizer::truncate($text, 8); // "Lorem ipsum"
-echo StringHumanizer::truncate($text, 8, '...'); // "Lorem ipsum..."
-echo StringHumanizer::truncate($text, 2); // "Lorem"
-echo StringHumanizer::truncate($text, strlen($text)); // "Lorem ipsum dolorem si amet, lorem ipsum. Dolorem sic et nunc."
+StringHumanizer::truncate($text, 8); // "Lorem ipsum"
+StringHumanizer::truncate($text, 8, '...'); // "Lorem ipsum..."
+StringHumanizer::truncate($text, 2); // "Lorem"
+StringHumanizer::truncate($text, strlen($text)); // "Lorem ipsum dolorem si amet, lorem ipsum. Dolorem sic et nunc."
 
 ```
 
@@ -55,10 +55,10 @@ use Coduo\PHPHumanizer\StringHumanizer;
 
 $text = '<p><b>HyperText Markup Language</b>, commonly referred to as <b>HTML</b>, is the standard <a href="/wiki/Markup_language" title="Markup language">markup language</a> used to create <a href="/wiki/Web_page" title="Web page">web pages</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span>[</span>1<span>]</span></a></sup> <a href="/wiki/Web_browser" title="Web browser">Web browsers</a> can read HTML files and render them into visible or audible web pages. HTML describes the structure of a <a href="/wiki/Website" title="Website">website</a> <a href="/wiki/Semantic" title="Semantic" class="mw-redirect">semantically</a> along with cues for presentation, making it a markup language, rather than a <a href="/wiki/Programming_language" title="Programming language">programming language</a>.</p>';
 
-echo StringHumanizer::truncateHtml($text, 3); // "<b>HyperText</b>"
-echo StringHumanizer::truncateHtml($text, 12, ''); // "HyperText Markup"
-echo StringHumanizer::truncateHtml($text, 50, '', '...'); // "HyperText Markup Language, commonly referred to as..."
-echo StringHumanizer::truncateHtml($text, 75, '<b><i><u><em><strong><a><span>', '...'); // '<b>HyperText Markup Language</b>, commonly referred to as <b>HTML</b>, is the standard <a href="/wiki/Markup_language" title="Markup language">markup...</a>'
+StringHumanizer::truncateHtml($text, 3); // "<b>HyperText</b>"
+StringHumanizer::truncateHtml($text, 12, ''); // "HyperText Markup"
+StringHumanizer::truncateHtml($text, 50, '', '...'); // "HyperText Markup Language, commonly referred to as..."
+StringHumanizer::truncateHtml($text, 75, '<b><i><u><em><strong><a><span>', '...'); // '<b>HyperText Markup Language</b>, commonly referred to as <b>HTML</b>, is the standard <a href="/wiki/Markup_language" title="Markup language">markup...</a>'
 
 ```
 
@@ -69,12 +69,12 @@ echo StringHumanizer::truncateHtml($text, 75, '<b><i><u><em><strong><a><span>',
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::ordinalize(0); // "0th"
-echo NumberHumanizer::ordinalize(1); // "1st"
-echo NumberHumanizer::ordinalize(2); // "2nd"
-echo NumberHumanizer::ordinalize(23); // "23rd"
-echo NumberHumanizer::ordinalize(1002, 'nl'); // "1002e"
-echo NumberHumanizer::ordinalize(-111); // "-111th"
+NumberHumanizer::ordinalize(0); // "0th"
+NumberHumanizer::ordinalize(1); // "1st"
+NumberHumanizer::ordinalize(2); // "2nd"
+NumberHumanizer::ordinalize(23); // "23rd"
+NumberHumanizer::ordinalize(1002, 'nl'); // "1002e"
+NumberHumanizer::ordinalize(-111); // "-111th"
 
 ```
 
@@ -83,25 +83,25 @@ echo NumberHumanizer::ordinalize(-111); // "-111th"
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::ordinal(0); // "th"
-echo NumberHumanizer::ordinal(1); // "st"
-echo NumberHumanizer::ordinal(2); // "nd"
-echo NumberHumanizer::ordinal(23); // "rd"
-echo NumberHumanizer::ordinal(1002); // "nd"
-echo NumberHumanizer::ordinal(-111, 'nl'); // "e"
+NumberHumanizer::ordinal(0); // "th"
+NumberHumanizer::ordinal(1); // "st"
+NumberHumanizer::ordinal(2); // "nd"
+NumberHumanizer::ordinal(23); // "rd"
+NumberHumanizer::ordinal(1002); // "nd"
+NumberHumanizer::ordinal(-111, 'nl'); // "e"
 ```
 
 **Roman numbers**
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::toRoman(1); // "I"
-echo NumberHumanizer::toRoman(5); // "V"
-echo NumberHumanizer::toRoman(1300); // "MCCC"
+NumberHumanizer::toRoman(1); // "I"
+NumberHumanizer::toRoman(5); // "V"
+NumberHumanizer::toRoman(1300); // "MCCC"
 
-echo NumberHumanizer::fromRoman("MMMCMXCIX"); // 3999
-echo NumberHumanizer::fromRoman("V"); // 5
-echo NumberHumanizer::fromRoman("CXXV"); // 125
+NumberHumanizer::fromRoman("MMMCMXCIX"); // 3999
+NumberHumanizer::fromRoman("V"); // 5
+NumberHumanizer::fromRoman("CXXV"); // 125
 ```
 
 **Binary Suffix**
@@ -111,15 +111,15 @@ Convert a number of bytes in to the highest applicable data unit
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::binarySuffix(0); // "0 bytes"
-echo NumberHumanizer::binarySuffix(1); // "1 bytes"
-echo NumberHumanizer::binarySuffix(1024); // "1 kB"
-echo NumberHumanizer::binarySuffix(1025); // "1 kB"
-echo NumberHumanizer::binarySuffix(1536); // "1.5 kB"
-echo NumberHumanizer::binarySuffix(1048576 * 5); // "5 MB"
-echo NumberHumanizer::binarySuffix(1073741824 * 2); // "2 GB"
-echo NumberHumanizer::binarySuffix(1099511627776 * 3); // "3 TB"
-echo NumberHumanizer::binarySuffix(1325899906842624); // "1.18 PB"
+NumberHumanizer::binarySuffix(0); // "0 bytes"
+NumberHumanizer::binarySuffix(1); // "1 bytes"
+NumberHumanizer::binarySuffix(1024); // "1 kB"
+NumberHumanizer::binarySuffix(1025); // "1 kB"
+NumberHumanizer::binarySuffix(1536); // "1.5 kB"
+NumberHumanizer::binarySuffix(1048576 * 5); // "5 MB"
+NumberHumanizer::binarySuffix(1073741824 * 2); // "2 GB"
+NumberHumanizer::binarySuffix(1099511627776 * 3); // "3 TB"
+NumberHumanizer::binarySuffix(1325899906842624); // "1.18 PB"
 ```
 
 Number can be also formatted for specific locale
@@ -127,7 +127,7 @@ Number can be also formatted for specific locale
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::binarySuffix(1536, 'pl'); // "1,5 kB"
+NumberHumanizer::binarySuffix(1536, 'pl'); // "1,5 kB"
 ```
 
 Number can also be humanized with a specific number of decimal places with `preciseBinarySuffix($number, $precision, $locale = 'en')`
@@ -136,8 +136,8 @@ The precision parameter must be between 0 and 3.
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::preciseBinarySuffix(1024, 2); // "1.00 kB"
-echo NumberHumanizer::preciseBinarySuffix(1325899906842624, 3); // "1.178 PB"
+NumberHumanizer::preciseBinarySuffix(1024, 2); // "1.00 kB"
+NumberHumanizer::preciseBinarySuffix(1325899906842624, 3); // "1.178 PB"
 ```
 
 This function also supports locale
@@ -145,7 +145,7 @@ This function also supports locale
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::preciseBinarySuffix(1325899906842624, 3, 'pl'); // "1,178 PB"
+NumberHumanizer::preciseBinarySuffix(1325899906842624, 3, 'pl'); // "1,178 PB"
 ```
 
 **Metric Suffix**
@@ -153,14 +153,14 @@ echo NumberHumanizer::preciseBinarySuffix(1325899906842624, 3, 'pl'); // "1,178
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::metricSuffix(-1); // "-1"
-echo NumberHumanizer::metricSuffix(0); // "0"
-echo NumberHumanizer::metricSuffix(1); // "1"
-echo NumberHumanizer::metricSuffix(101); // "101"
-echo NumberHumanizer::metricSuffix(1000); // "1k"
-echo NumberHumanizer::metricSuffix(1240); // "1.2k"
-echo NumberHumanizer::metricSuffix(1240000); // "1.24M"
-echo NumberHumanizer::metricSuffix(3500000); // "3.5M"
+NumberHumanizer::metricSuffix(-1); // "-1"
+NumberHumanizer::metricSuffix(0); // "0"
+NumberHumanizer::metricSuffix(1); // "1"
+NumberHumanizer::metricSuffix(101); // "101"
+NumberHumanizer::metricSuffix(1000); // "1k"
+NumberHumanizer::metricSuffix(1240); // "1.2k"
+NumberHumanizer::metricSuffix(1240000); // "1.24M"
+NumberHumanizer::metricSuffix(3500000); // "3.5M"
 ```
 
 Number can be also formatted for specific locale
@@ -168,7 +168,7 @@ Number can be also formatted for specific locale
 ```php
 use Coduo\PHPHumanizer\NumberHumanizer;
 
-echo NumberHumanizer::metricSuffix(1240000, 'pl'); // "1,24M"
+NumberHumanizer::metricSuffix(1240000, 'pl'); // "1,24M"
 ```
 
 ## Collections
@@ -178,9 +178,9 @@ echo NumberHumanizer::metricSuffix(1240000, 'pl'); // "1,24M"
 ```php
 use Coduo\PHPHumanizer\CollectionHumanizer;
 
-echo CollectionHumanizer::oxford(['Michal', 'Norbert', 'Lukasz', 'Pawel'], 2); // "Michal, Norbert, and 2 others"
-echo CollectionHumanizer::oxford(['Michal', 'Norbert', 'Lukasz'], 2); // "Michal, Norbert, and 1 other"
-echo CollectionHumanizer::oxford(['Michal', 'Norbert']); // "Michal and Norbert"
+CollectionHumanizer::oxford(['Michal', 'Norbert', 'Lukasz', 'Pawel'], 2); // "Michal, Norbert, and 2 others"
+CollectionHumanizer::oxford(['Michal', 'Norbert', 'Lukasz'], 2); // "Michal, Norbert, and 1 other"
+CollectionHumanizer::oxford(['Michal', 'Norbert']); // "Michal and Norbert"
 ```
 
 Oxford is using translator component, so you can use whatever string format you like.
@@ -192,23 +192,23 @@ Oxford is using translator component, so you can use whatever string format you
 ```php
 use Coduo\PHPHumanizer\DateTimeHumanizer;
 
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:00:00")); // just now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:00:05")); // 5 seconds from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:59:00")); // 1 minute ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:45:00")); // 15 minutes ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:15:00")); // 15 minutes from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 14:00:00")); // 1 hour from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 15:00:00")); // 2 hours from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:00:00")); // 1 hour ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-25")); // 1 day ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-24")); // 2 days ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-28")); // 2 days from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-01"), new \DateTime("2014-04-15")); // 2 weeks from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-04-15"), new \DateTime("2014-04-07")); // 1 week ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-01-01"), new \DateTime("2014-04-01")); // 3 months from now
-echo DateTimeHumanizer::difference(new \DateTime("2014-05-01"), new \DateTime("2014-04-01")); // 1 month ago
-echo DateTimeHumanizer::difference(new \DateTime("2015-05-01"), new \DateTime("2014-04-01")); // 1 year ago
-echo DateTimeHumanizer::difference(new \DateTime("2014-05-01"), new \DateTime("2016-04-01")); // 2 years from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:00:00")); // just now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:00:05")); // 5 seconds from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:59:00")); // 1 minute ago
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:45:00")); // 15 minutes ago
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 13:15:00")); // 15 minutes from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 14:00:00")); // 1 hour from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 15:00:00")); // 2 hours from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-26 12:00:00")); // 1 hour ago
+DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-25")); // 1 day ago
+DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-24")); // 2 days ago
+DateTimeHumanizer::difference(new \DateTime("2014-04-26"), new \DateTime("2014-04-28")); // 2 days from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-01"), new \DateTime("2014-04-15")); // 2 weeks from now
+DateTimeHumanizer::difference(new \DateTime("2014-04-15"), new \DateTime("2014-04-07")); // 1 week ago
+DateTimeHumanizer::difference(new \DateTime("2014-01-01"), new \DateTime("2014-04-01")); // 3 months from now
+DateTimeHumanizer::difference(new \DateTime("2014-05-01"), new \DateTime("2014-04-01")); // 1 month ago
+DateTimeHumanizer::difference(new \DateTime("2015-05-01"), new \DateTime("2014-04-01")); // 1 year ago
+DateTimeHumanizer::difference(new \DateTime("2014-05-01"), new \DateTime("2016-04-01")); // 2 years from now
 ```
 
 **Precise difference**
@@ -216,9 +216,9 @@ echo DateTimeHumanizer::difference(new \DateTime("2014-05-01"), new \DateTime("2
 ```php
 use Coduo\PHPHumanizer\DateTimeHumanizer;
 
-echo DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-25 11:20:00")); // 1 day, 1 hour, 40 minutes ago
-echo DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2015-04-28 17:00:00")); // 1 year, 2 days, 4 hours from now
-echo DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2016-04-27 13:00:00")); // 2 years, 1 day from now
+DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2014-04-25 11:20:00")); // 1 day, 1 hour, 40 minutes ago
+DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2015-04-28 17:00:00")); // 1 year, 2 days, 4 hours from now
+DateTimeHumanizer::preciseDifference(new \DateTime("2014-04-26 13:00:00"), new \DateTime("2016-04-27 13:00:00")); // 2 years, 1 day from now
 ```
 
 Currently we support following languages: