#include <iostream>
#include <string>

using namespace std;

string s[100];

int main(){
    int n;
    cin >>n;
    for (int i=0; i<n; i++){
        cin >>s[i];
        }
/*    for (int i=0; i<n; i++){
        int j=0;
        while(s[i][j]){
        cout <<s[i][j]<<" ";
        j++;
        }
        cout <<endl;
        }*/
        if (n%2==0)
        cout <<"!";
        if (n%2==1)
        cout <<"?";
    //system ("pause");
    return 0;
    }