package main

import (
	"fmt"
	"strings"
	
	)
	
	func main() {
		var n int
		var s string
		fmt.Scan(&n)
		fmt.Scan(&s)
		if strings.Contains(s, "404") {
			fmt.Println("Found")
		} else {
			fmt.Println("NotFound")
		}
	}