# Enter a code
L = ['Alice', 66, 'Bob', True, 'False', 100]
num = 0
for x in L:
num = num + 1
if num % 2 == 0:
print(x)
这样做也行
s1 = 'ABC'
s2 = '123'
s3 = 'xyz'
s = s1 + s2 + s3
for ch1 in s:
for ch2 in s:
for ch3 in s:
if ch1 != ch2 and ch1 != ch3 and ch2 != ch3:
print(ch1 + ch2 + ch3)
