word=raw_input()
while len(word)!=0: # To make it loop until empty input is provided (emtpy line)
# Actual code:
j=len(word)
for i in range(0, j):
a=i if i<(len(word)/2) else j-1
b=j-2 if i<(len(word)/2) else i-1
j-=1
print(' '*a + word[i] + ((' '*(b-a) + word[i]) if (i!=j) else ''))
# Actual code end
word=raw_input()
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