package main

import (
	"fmt"
	"strings"
)

func resolve(S string, B []string) string {
	cnt := 8 * 8
	for i := 0; i < 8; i++ {
		cnt -= strings.Count(B[i], ".")
	}
	if cnt%2 == 0 {
		return S
	}
	if S == "oda" {
		return "yukiko"
	} else {
		return "oda"
	}
}

func main() {
	var S string
	fmt.Scanf("%s\n", &S)
	B := make([]string, 8)
	for i := 0; i < 8; i++ {
		fmt.Scanf("%s\n", &B[i])
	}
	fmt.Println(resolve(S, B))
}