大神帮我 看看，下面的代码为什么不对，输不出结果？
for x in [1,2,3,4,5,6,7,8,9 ]:
for y in [1,2,3,4,5,6,7,8,9 ]:
if x<y:
in=10*x+y
print in
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for x in [1,2,3,4,5,6,7,8,9 ]:
for y in [1,2,3,4,5,6,7,8,9 ]:
if x<y:
in=10*x+y
print in
2017-04-15
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