from random import randrange

def duel():
    sentinel = 0
    arraya = []
    arrayb = []
    while sentinel < 1000:
        a = randrange(1, 3)
        b = randrange(1, 4)
        if a == 1:
            arraya.append(sentinel)
        if b == 1:
            arrayb.append(sentinel)            
        sentinel += 1

    percenta = str((len(arraya) / 1000.0) * 100)
    percentb = str((len(arrayb) / 1000.0) * 100)
    print "A wins the duel " + percenta + "% of the time."
    print "B wins the duel " + percentb + "% of the time."

duel()