package main

import (
	"fmt"
	"log"
	"strings"
)

func main()  {
	var s string
	_, _ = fmt.Scan(&s)
	slice := strings.Split(s, ",")
	result := true
	for _, ss := range slice {
		if ss != "AC" {
			result = false
		}
	}
	if result {
		log.Print("Done!")
	} else {
		log.Print("Failed...")
	}
}