AoC Day2

from collections import Counter

#Läs fil och rengör den...
myfile = open('input.txt', 'r')
contents = myfile.read().strip().splitlines()
myfile.close()

#Del 1

#c = 2d array
c = [0, 0]
def p1():
    for i in contents:
        a = [b for i,b in Counter(i).most_common()]
        if 3 in a:
            c[0] += 1
        if 2 in a:
            c[1] += 1
    return c[0] * c[1]



def p2():
    for i in contents:
        for b in contents:
            diffs = 0
            for y, x in enumerate(i):
                if x != b[y]:
                    diffs += 1
            if diffs == 1:
                ans = [x for y, x in enumerate(i) if b[y] == x]
                return ans

print(p1())
print(''.join(p2()))