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

#define READ_BUFSIZE ( 1024 )
#define READ_DELIMITER ( " " )

int count(char* pB)
{
	int cnt = 0;
	for (int i = 0; i < 8; i++)
	{

		if (pB[i] == '.')
			cnt++;
	}

	return(8 - cnt);
}

int main(int argc, char *argv[]) 
{
	char s[10] = "";
	scanf("%s", s);

	char B[10] = "";
	int cnt = 0;
	for (int i = 0; i < 8; i++)
	{
		scanf("%s", B);
		cnt += count(B);

	}

	char out[10] = "yukiko";
	if ( ( cnt % 2 == 0 && s[0] == 'o' ) ||
		 ( cnt % 2 && s[0] == 'y' ) )
	{
			strcpy(out, "oda");
	}

	printf("%s\n", out);

	return 0;

}