class Yukicoder
  def initialize
    old = encode(gets.chomp.split('.').map(&:to_i))
    new = encode(gets.chomp.split('.').map(&:to_i))

    puts (old > new)? 'YES' : 'NO'
  end

  def encode(version)
    version[0] * 10000 + version[1] * 100 + version[2]
  end
end

Yukicoder.new