fossil = gets.split(".").map(&:to_i)
current = gets.split(".").map(&:to_i)

if fossil = current
    puts "YES"
    return
end

for i in 0..2
    if fossil[i] > current[i]
        puts "YES"
        return
    elsif fossil[i] < current[i]
        puts "NO"
        return
    else
        next
    end
end