title: Insert a COMMA after p,q,r,s... no. of char in a multiline file
body: <p>I have a huge file of ascii chars (million lines). I want to convert this to a <code>.csv</code> file in which the first column would have <code>m</code> chars second would have <code>n</code> chars and so on <code>number of columns</code> and the <code>number of character in respective col</code> will be fixed.This should happen to every line of the file. And yes the lines in file will just contain [a-z] [A-Z] and [0-9]. (no special char, includind space)</p>