Sorry for maybe naive question but....
Assuming that my alphabet is complete i.e. contains all characters and digits.
I wonder if there is a possibility that encode method would return a hash which contains only digits?
Other words is there a string which can be encoded and the result contains only digits?
Is it guaranteed that at leat one letter is present in the output?
No, alphabet must contain at least 16 unique characters, including numbers. This is by design.
There is no guarantee that the output will contains a group of the alphabet characters.
Sorry for maybe naive question but.... Assuming that my alphabet is complete i.e. contains all characters and digits. I wonder if there is a possibility that encode method would return a hash which contains only digits? Other words is there a string which can be encoded and the result contains only digits? Is it guaranteed that at leat one letter is present in the output?