将1234数字，组成不重复的3数字组合,并统计组合个数

total=0
for a in range(1,5):
    for b in range(1,5):
        for c in range(1,5):
            if a!=b and a!=c and b!=c:
                total = total + 1
                print(a, b, c)
print(total)