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# Day Two: Inventory Management System
file = open("input/02.txt").readlines()
twice: int = 0
thrice: int = 0
for line in file:
for char in "abcdefghijklmnopqrstuvwxyz":
if line.count(char) == 2:
twice += 1
break
for char in "abcdefghijklmnopqrstuvwxyz":
if line.count(char) == 3:
thrice += 1
break
print(twice * thrice)
for one in file:
for two in file:
differing = 0
for i in range(len(one)):
if one[i] != two[i]:
differing += 1
if differing == 1:
for i in range(len(one)):
if one[i] == two[i]:
print(one[i], end="")
quit()
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