package main

import "fmt"

func main() {
	var c1, c2, c3 string
	fmt.Scan(&c1, &c2, &c3)
	if c1 == "?" || c3 == "?" {
		if c2 == "2" {
			fmt.Println("4")
		} else {
			fmt.Println("1")
		}
	} else {
		fmt.Println("14")
	}
}