#!/bin/sh
gwgawk '
BEGIN	{
	  N=50
	  bl = " "
	  for(i=1;i<=N;i++)
		bl=bl " "
	}
	{ if ((len = length($0) )<= N  )
	    print
	  else {
	    printf "%s\\\n", substr($0,1,N)
	    printf "%s%s\n", substr(bl,1,2*N-len), substr($0,N+1,len-N)
	  }
	}
'