#include <stdio.h>

int main(void)
{
	char s[7], c[8][9];
	int i = 0, j, b = 0, w = 0;
	scanf("%s", s);
	for (i; i < 8; i++) {
		scanf("%s", c[i]);
	}
	for (i = 0; i < 8; i++) {
		for (j = 0; j < 8; j++) {
			c[i][j] == 98 ? b++ : c[i][j] == 119 ? w++ : 0;
		}
	}
	puts(b == w ? s : b > w&&*s == 111 ? "yukiko" : b > w ? "oda" : s);
	return 0;
}