package main

import (
	"fmt"
	"math/rand"
)

func main() {
	var X, Y int
	var a, b, c, d int
	for {
		a = rand.Intn(10)
		b = rand.Intn(10)
		c = rand.Intn(10)
		d = rand.Intn(10)
		fmt.Printf("%d %d %d %d\n", a, b, c, d)
		fmt.Scan(&X, &Y)
		if X == 4 && Y == 0 {
			break
		}
	}
}