package main

import "fmt"

func main() {
	var s string
	fmt.Scan(&s)
	t := ""
	if s == "oda" {
		t = "yukiko"
	} else {
		t = "oda"
	}
	cnt := -4
	for i := 0; i < 8; i++ {
		var b string
		fmt.Scan(&b)
		for _, c := range b {
			if c != '.' {
				cnt++
			}
		}
	}
	if cnt%2 == 0 {
		fmt.Println(s)
	} else {
		fmt.Println(t)
	}
}