Как вернуть ключ значения i?

from textwrap import wrap


def decryption(d):
    a = str(32 + d)
    b = str(48 + d)
    c = str(25 + d)
    f = str(94 + d)
    dict = {'а': a, 'б': b, 'в': c, 'г': f}
    word = str(input('Enter the decryption word:'))

    def get_key(dict, word):
        a = wrap(word, 2)
        for i in a:
            if i in dict.values():
                return ????

    print(get_key(dict, word))


decryption(1)