MorseCode

import math

def morse(string):
    key = "?????E?I??S?H??5???????B6D????N????L????R?7???F???T?A??U?V??4???????P8K????M?????????W?????Q????3???O?Y??9???????J?????????2?????????????????1????????0"
    valdict = {".":1, "-":10}
    letters = string.split(" ")
    result = ""
    for letter in letters:
        sm = 0
        for i in range(len(letter)):
            try:
                sm += (i + 1) * valdict[letter[i]]
            except KeyError:
                pass
        sm = int(math.floor(sm * 5 / len(letter)))
        try:
            result += key[sm]
        except IndexError:
            result += "?"
    return result