Generate combinations using positions

[jaysongyn]

I created recursive function to generate all secrets combinations.
Let say you password could be "SecrEt!insecure" but you don't know each letter that is capitalize. You can set all possibilities for each position:
positions = [
['s', 'S'],
['e', 'E','&'],
['c', 'c'],
['r', 'R'],
['e', 'E'],
['t', 't'],
['1','!',''],
['_','',' '],
['insecure']
];