12 characters with only 5 letters.
[hint]5 letters is what you need for prefix and suffix[/hint]
We have enough letters for prefix and suffix but too many numbers. Start by splitting the code in 2
Reverse both strings
Looks more and more like a code. Recombine the strings
53 is the keyword part. Convert to leetspeak
14 characters, the commas give it away.
Those commas give it away as a keyboard flip. So 1=0, q=p, a=; and z=/
/dah is not a keyword. Notice that the Z which became / was the only capital letter in the code. Shift-/ is ?
The question mark can be sub by Why to make the keyword whydah
30 letters. Try to find where they come from !
All those letters are from the first row of letters on the keyboard. Shift them up to numbers and make pairs
72 84 79 55 53 65 86 79 73 68 57 50 56 88 85
Convert decimal to Ascii