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s,n=input()
k=n
while k<=len(s):print s[k-n:k].ljust(n)+'\n'+s[k+n-1:k-1:-1];k+=2*n

Success #stdin #stdout 0.01s 8976KB

stdin

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"Programming Puzzles & Code Golf", 4

stdout

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Prog
mmar
ing 
zzuP
les 
oC &
de G
flo

https://ideone.com/jpDwEF

language:

Python (cpython 2.7.16)

created:

visibility:

secret

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