#include <stdio.h>
#include <string.h>

#define A "oda"
#define B "yukiko"

int main(void)
{
	char s[10],b[8][10];
	char i,j,stone;
	scanf("%s",s);
	for (i=0;i<8;i++) scanf("%s",b[i]);

	stone = 0;
	for (i=0;i<8;i++) {
		for (j=0;j<8;j++) {
			if (b[i][j] != '.') {
				stone++;
			}
		}
	}

	if        (stone % 2 == 0) {
		if (strcmp(s,A)==0) printf("%s\n",A);
		else 								printf("%s\n",B);
	} else if (stone % 2 == 1) {
		if (strcmp(s,A)==0) printf("%s\n",B);
		else                printf("%s\n",A);
	}
	
	return 0;
}