while True:
    hours = raw_input("How many hours?\n")
    rate = raw_input("What is the rate?\n")
    try:
        if hours <= 40:
            print hours * rate

        elif hours > 40:
            calc = (40 * 10) + ((hours - 40) * (1.5 * rate))
            print "Your pay will be " + str(calc) + " for this week\n"
        break
    except:
            print "Please enter a valid input"