package main

import . "fmt"
import . "strings"

func main() {
	var s string
	Scan(&s)
	d :=0
	for i:=0;i<8;i++ {
		var b string
		Scan(&b)
		d += Count(b,".")
	}
	if d%2==0 {
		Println(s)
	} else if s == "yukio" {
		Println("oda")
	} else {
		Println("yukiko")
	}
}