#include <stdio.h>
int main(){
    char S[6+1];
    scanf("%s",S);

    char B[8][8];
    for (int i = 0;i < 8;i++){
        char tmp[8+1];
        scanf("%s",tmp);
        for (int j = 0;j < 8;j++){
            B[i][j] = tmp[j];
        }
    }

    int count = 0;
    for (int i = 0;i < 8;i++){
        for (int j = 0;j < 8;j++){
            if (B[i][j] == 'b' || B[i][j] == 'w'){
                count++;
            }
        }
    }

    if (count%2 == 0){
        printf("%s\n",S);
    }else{
        if (S[0] == 'o'){
            printf("yukiko\n");
        }else{
            printf("oda\n");
        }
    }

}