#!/bin/sh -
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 }
'
