package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)
var rdr = bufio.NewReaderSize(os.Stdin, 1000000)

func main() {
	sc.Split(bufio.ScanWords)
	m := []rune{' ', 'y', 'u', 'k', 'i', 'c', 'o', 'd', 'e', 'r'}
	for {
		n := nextInt()
		if n == 0 {
			break
		}

		fmt.Println(string(m[n]))
	}
}

func nextLine() string {
	sc.Scan()
	return sc.Text()
}

func nextInt() int {
	i, _ := strconv.Atoi(nextLine())
	return i
}