ekhumoro
2020-12-08 08:59:03
A simple solution would be to first convert to a hex encoding:
jrioj4oi3m_=.,ei9#=>6a72696f6a346f69336d5f3d2e2c65693923
and then translate any numbers into non-hex letters:
6a72696f6a346f69336d5f3d2e2c65693923=>waxswzwfwatuwfwzttwdvftdsescwvwztzst
So the output string would always be exactly twice the length of the input string and only ever contain characters in the range a-z.
This can be easily achieved in python like this:
>>> enc = str.maketrans('0123456789', 'qrstuvwxyz')
>>> dec = str.maketrans('qrstuvwxyz', '0123456789')
>>> s = 'jrioj4oi3m_=.,ei9#'
>>> x = s.encode('ascii').hex().translate(enc)
>>> x
'waxswzwfwatuwfwzttwdvftdsescwvwztzst'
>>> bytes.fromhex(x.translate(dec)).decode('ascii')
'jrioj4oi3m_=.,ei9#'