from string import ascii_letters as lett

value = {}
score = 0
x = 0

for i in range(len(lett)):
    value[lett[i]] = i+1

f = open('input3.txt', 'r')
inp = f.read().splitlines(keepends=False)


while x < len(inp): 
    fir =  inp[x]
    sec = inp[x+1]
    thi = inp[x+2]
    for i in range(len(fir)):
        if fir[i] in sec and fir[i] in thi:
            charr = fir[i]
            break
    score = score + value[charr]
    x = x + 3
print(score)