import string n = int(input()) while True: try: s = input().lower() lows = string.ascii_lowercase result = [] out = 0 for i in lows: c = s.count(i) if c > 0: result.append(c)

    newresult = (sorted(result))[::-1]

    for i in range(len(newresult)):
        a = (26-i) * newresult[i]
        out += a
    print(out)

except:
    break