def x(t,n):\x0d if len(t)<n+1:\x0d if t:print" "*(len(t)-1)+".".join(t)\x0d for j in range(3):x(t+[str(j+1)],n)\x0d x([],input())
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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