Componente que cambia la primera columna a una fila separada por comas

Sintaxis: -IN:str -OUT:str

Donde:
-IN   	Directorio que contiene los documentos de entrada
-OUT  	Directorio donde se guardar‡ la salida


Ejemplo de entrada
40 1:15 2:6 3:0.14814814814814814 4:287 5:37.5 6:100.0 7:0 8:0 9:100.0 10:100.0 11:100.0 12:16 13:17 14:346 15:0.53333336 16:62.0 17:13 18:100.0 19:100.0 20:-1 21:93.0 22:-1 23:0.0 24:0.46666667 25:0.42857143 26:0.0 27:0.14285715 28:4 29:1.3822953 30:1 
40 1:17 2:6 3:0.125 4:314 5:35.294117 6:100.0 7:0 8:0 9:100.0 10:100.0 11:100.0 12:17 13:18 14:379 15:0.5555556 16:72.0 17:16 18:100.0 19:100.0 20:-1 21:94.0 22:-1 23:0.0 24:0.44444445 25:0.375 26:0.0 27:0.125 28:4 29:1.3845805 30:1 
45 1:1 2:0 3:0.1875 4:73 5:75.0 6:100.0 7:0 8:100.0 9:100.0 10:100.0 11:100.0 12:4 13:7 14:86 15:0.0 16:15.0 17:7 18:100.0 19:100.0 20:100.0 21:66.0 22:-1 23:0.0 24:0.0 25:0.0 26:0.0 27:0.0 28:4 29:1.9450402 30:0 
48 1:2 2:3 3:0.12 4:114 5:75.0 6:100.0 7:0 8:0 9:0 10:100.0 11:100.0 12:4 13:1 14:123 15:0.5 16:33.0 17:9 18:80.0 19:-1 20:-1 21:62.0 22:-1 23:0.0 24:0.5 25:0.0 26:0.0 27:0.33333334 28:4 29:0.90057284 30:0 

Ejemplo de salida
40,40,45,48