class Calc0138
  def initialize(args)
    args = args.map { |l| l.chomp.split(/\s+/) }
    @v1 = args.shift.first
    @v2 = args.shift.first
  end

  def calc
    (@v1.split('.').map(&:to_i) <=> @v2.split('.').map(&:to_i)) >= 0
  end

  def run
    calc ? 'YES' : 'NO'
  end
end

puts Calc0138.new(STDIN.readlines).run if __FILE__ == $0