#include <cstdio>
#include <iostream>
#include <string>
using namespace std;
#define For(i,x) for (int i=0; i<(int)(x); i++)

std::string other(const std::string& myname) {
    if (myname == "oda")
        return "yukiko";
    return "oda";
}

int main() {
    char name[100];
    scanf("%s", name);

    int stone = 0;
    For(i, 8) {
        char s[100];
        scanf("%s", s);
        For(j, 8) {
            if (s[j] != '.') {
                stone++;
            }
        }
    }

    if (stone % 2 == 0)
        puts(name);
    else
        puts(other(name).c_str());
}