#include<iostream>

int main()
{
    using std::cin;
    using std::cout;
    using std::endl;
    using std::string;
    
    string S,B;
    cin >> S;
    string notS = (S=="oda" ? "yukiko" : "oda");
    
    int words = 0;
    for(int j=0; j<8; j++) {
        cin >> B;
        for(int i=0; i<B.length(); i++) {
            if(B[i] != '.') { words++; }
            else {}
        }
    }
    
    cout << (words%2==0 ? S : notS) << endl;
    return 0;
}