#!/usr/bin/env python3

INPUT_FILE = 'input'

def grouper(n, iterable, fill=None):
    args = [iter(iterable)] * n
    #return izip_longest(fillvalue=fillvalue, *args)
    return zip(*args)

def main():
    content = map(str.strip, open(INPUT_FILE, 'r').readlines())
    score = 0
    gen = grouper(3, content)
    for r1,r2,r3 in gen:
        for char in r1:
            if char in r2 and char in r3:
                print(char)
                if char.islower():
                    score += ord(char) - 96
                else:
                    score += ord(char) - 38
                break
    print(score)

if __name__ == '__main__':
    main()