#!/bin/sh -
exec awk '
/./	{ for (i = 0; i < NF; ++i) { 
			if (length(line) == 0) 
				line = $$i 
			else { 
				if (length(line " " $$i) < 70) 
					line = line " " $$i 
				else { 
					print line ; 
					line = $$i ; 
				} ; 
			} 
		  } 
		} 
	END	{ if (length(line) > 0) print line }'
