#include <stdio.h>


int main(void){
	int 	i,j,w=0;
	char	c[7],b[9];

	scanf("%s",&c);

	for(i=0;i<8;i++){
			scanf("%s",&b);
		for(j=0;j<8;j++){
			if(b[j]=='.') w++;
		}
	}

	if(w%2==0)	printf(c[0] == 'y' ? "yukiko" : "oda");
	else		printf(c[0] == 'y' ? "oda" : "yukiko");

	return 0;
}