#include <iostream>

int main()
{
    char name[7];
    std::cin >> name;
    
    int count = 0;
    char in[9];
    for(int i = 0; i < 8; i++)
    {
        std::cin >> in;
        for(int j = 0; j < 8; j++)
        {
            if(in[j] != '.')
                count++;
        }
    }
    
    if((count % 2) == 0)
    {
        std::cout << name << std::endl;
    }
    else
    {
        std::cout << ((name[0] == 'o')? "yukiko":"oda") << std::endl;
    }
    
    return 0;
}