The puzzle `884-898a9e3d` from #884 has to be resolved: https://github.com/php-coder/mystamps/blob/524a9b3aedd30535bbd010d40b1673671ccab77a/src/main/webapp/WEB-INF/views/collection/estimation.html#L118-L118 The puzzle was created by Slava Semushin on 21-Jun-18.