python学习----5本书，三个人各借一本，多少种借法

book = [1, 2, 3, 4, 5]
count = 0
for a in book:
    for b in book:
        if a != b:
            for c in book:
                if c != a and c != b:
                    count += 1
                    print("第%d种：A借书%d，B借书%d，C借书%d" % (count, a, b, c))