package main

import . "fmt"

func main() {
	var n,a,b,c,d,e,f int
	Scan(&n,&a,&b,&c,&d,&e,&f)
	Println(4)
	Println(e,f+1)
	Println(e,f-1)
	Println(e-1,f)
	Println(e+1,f)
}