package main

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

var reader = bufio.NewReader(os.Stdin)
var writer = bufio.NewWriter(os.Stdout)

func toDigits(x, base int) []int {
	if x == 0 {
		return []int{0}
	}

	ans := make([]int, 0)
	for x != 0 {
		ans = append(ans, x%base)
		x = x / base
	}
	return ans
}

func main() {
	defer writer.Flush()

	var n int
	fmt.Fscan(reader, &n)

	if len(toDigits(n, 10)) == 2 {
		fmt.Fprintf(writer, "%v\n", "Yes")
	} else {
		fmt.Fprintf(writer, "%v\n", "No")
	}
}