#include <iostream>
#include <string>
#include <vector>
using namespace std;

int main() {
    vector<char> s(3);
    cin >> s[0] >> s[1] >> s[2];
    vector<int> test(3);
    for(int i = 0;i < 3;i++){
        if(s[i] == '2')test[i] = 2;
        else if(s[i] == '3')test[i] = 3;
        else if (s[i] == '?')test[i] = 1;
    }
    if(test[1] < test[0] && test[1] < test[2])cout << 1;
    else if(test[1] > test[0] && test[1] > test[2])cout << 1;
    for(int i = 0;i < 3;i++){
        if(s[i] == '2')test[i] = 2;
        else if(s[i] == '3')test[i] = 3;
        else if (s[i] == '?')test[i] = 4;
    }
    if(test[1] < test[0] && test[1] < test[2])cout << 4;
    else if(test[1] > test[0] && test[1] > test[2])cout << 4;
    cout << endl;
    return 0;
}