#include <cstdio>
#include <cstring>

char name[2][10] = {"oda", "yukiko"};

int main(){
    char S[10];
    scanf("%s", S);

    int first;
    if(strcmp(S, name[0]) == 0){first = 0;}
    else{first = 1;}

    int n = 0;
    for(int i=0;i<8;i++){
        char s[10];
        scanf("%s", s);
        for(int j=0;j<8;j++){
            if(s[j] != '.'){n += 1;}
        }
    }

    if(n % 2 == 0){puts(name[first]);}
    else{puts(name[!first]);}
}