#!/usr/local/bin/cz --
# rins - insert a line at a random point in a file
use b

def usage()
	usage("file line")

Main:
	cstr file, line
	Getargs(cstr, file, line)
	int n=0
	F_in(file):
		Eachline(l):
			use(l)
			++n
	int i = Randi(n+1)
	F_in(file):
		Eachline(l):
			if i == 0:
				say(line)
			say(l)
			--i
		if i == 0:
			say(line)