package main

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

func version(sc *bufio.Scanner) []int {
	sc.Scan()
	input := strings.Split(sc.Text(), ".")
	version := make([]int, len(input))
	for i, v := range input {
		if j, e := strconv.Atoi(v); e != nil {
			panic(e)
		} else {
			version[i] = j
		}
	}
	return version
}

func powerInt(a, b int) int {
	result := 1
	for i := 0; i < b; i++ {
		result *= a
	}
	return result
}

func main() {
	sc := bufio.NewScanner(os.Stdin)
	ver0 := version(sc)
	ver1 := version(sc)
	n := len(ver0)
	diff := 0
	for i := 0; i < n; i++ {
		diff += ver0[i] * powerInt(1000, n-i)
		diff -= ver1[i] * powerInt(1000, n-i)
	}
	if diff < 0 {
		fmt.Println("NO")
	} else {
		fmt.Println("YES")
	}
}