#!/usr/bin/python

import sys
import re
import string

alphabet = "0" + string.ascii_lowercase
goodRe = re.compile("^[0a-z]*$")

for s in [s.lower() for s in sys.argv[1:]]:
    if not goodRe.match(s):
        print(f"failed to decode {s}: wrong format", file=sys.stderr)
        continue
    result = 0
    for c in s:
        result *= 26
        result += alphabet.index(c)
    print(f"{s} = {result-1}")