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#!/usr/bin/python
###########################################################################
# script name: ch-1.py #
# #
# https://perlweeklychallenge.org/blog/perl-weekly-challenge-046/ #
# #
###########################################################################
message1 = """H x l 4 !
c e - l o
z e 6 l g
H W l v R
q 9 m # o"""
message2 = '''P + 2 l ! a t o
1 e 8 0 R $ 4 u
5 - r ] + a > /
P x w l b 3 k \\
2 e 3 5 R 8 y u
< ! r ^ ( ) k 0'''
def decode (message):
message = message.replace(" ","")
rowLength = message.index('\n')
decodedString = [None] * rowLength
seen = {}
for i in range(0,rowLength):
seen.update({ i : {}})
col = 0
for char in message:
if char == '\n':
col = 0
continue
if char in seen[col]:
seen[col][char] += 1
if seen[col][char] == 2:
decodedString[col] = char
else:
seen[col].update({char: 1})
col += 1
return ''.join(decodedString)
print(decode(message1))
print(decode(message2))
# ch-1.py output:
# Hello
# PerlRaku
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