#!/usr/bin/env python3

INPUT_FILE = 'input'

def main():
    content = map(str.strip, open(INPUT_FILE, 'r').readlines())
    score = 0
    for line in content:
        c1 = line[:len(line)//2]
        c2 = line[len(line)//2:]
        for char in c1:
            if char in c2:
                print(char)
                if char.islower():
                    score += ord(char) - 96
                else:
                    score += ord(char) - 38
                break
    print(score)

if __name__ == '__main__':
    main()