#include <iostream> 
using namespace std;

int main() {
    string S;
    cin >> S;
    bool if_oda = false;
    if(S == "oda"){
        if_oda = true;
    }
    for(int i = 0; i < 8; i++){
        string B;
        cin >> B;
        for(int j = 0; j < 8; j++){
            if(B[j] != '.'){
                if_oda = (if_oda + 1) % 2;
            }
        }
    }
    if(if_oda){
        cout << "oda" << endl;
    }else{
        cout << "yukiko" << endl;
    }
}