#include<stdio.h>
int main()
{
	char str[3];
	scanf("%c %c %c", &str[0], &str[1], &str[2]);
	if (str[1] == '?')
		printf("14\n");
	else if (str[1] == '2')
		printf("4\n");
	else
		printf("1\n");
}