#include <bits/stdc++.h>
using namespace std;

int main(){
    vector <string> str;
    string tmp, name, name2;
    int i, j, cnt = 0;

    cin >> name;
    if(name == "oda"){
        name2 = "yukiko";
    }else{
        name2 = "oda";
    }
    while(cin >> tmp){
        str.push_back(tmp);
    }

    for(i = 0; i < 8; i++){
        for(j = 0; j < 8; j++){
            if(str[i][j] != '.'){
                cnt++;
            }
        }
    }

    if(cnt%2 == 0){
        cout << name << endl;
    }else{
        cout << name2 << endl;
    }

    return 0;
}