Python 3.7.0 (v3.7.0:1bf9cc5093, Jun 26 2018, 23:26:24) 
[Clang 6.0 (clang-600.0.57)] on darwin
Type "copyright", "credits" or "license()" for more information.
>>> (19 + 12) % 26
5
>>> 
=========== RESTART: /Users/koc/Desktop/abc.py ===========
>>> let2ind("d")
3
>>> let2ind(" ")
36
>>> let2ind("A")
0
>>> 
>>> let2ind("-")
0
>>> 
=========== RESTART: /Users/koc/Desktop/abc.py ===========
>>> ind2let(0)
'a'
>>> ind2let(5)
'f'
>>> ind2let(25)
'z'
>>> ind2let(26)
'0'
>>> 
=========== RESTART: /Users/koc/Desktop/abc.py ===========
>>> vEnc("l","m")
'x'
>>> vEnc("n", " ")
'i'
>>>