#!/bin/ruby

input = gets.chomp(' ')
oldA = input[0].to_i
oldB = input[1].to_i
oldC = input[2].to_i

input = gets.chomp(' ')
currentA = input[0].to_i
currentB = input[1].to_i
currentC = input[2].to_i

old = oldA * 10101 + oldB * 101 + oldC
current = currentA * 10101 + currentB * 101 + currentC

if current <= old
  puts 'YES'
else
  puts 'NO'
end