Warning: Contains major spoilers. Don't read this if you want to find out by yourself!
Search the internet for a standard ASCII table.
Write down the gibberish from B2 numbering each character starting with 1, like this:
1 = *
2 = z
4 = z
5 = )
To translate the * find the * in the ASCII table, it will correspond to a number. Since the * is at an odd position add 5 to that number and use the ASCII table to translate the new number to another character. The * will become a /.
Continue in this way remembering to add 5 at odd positions and subtract 3 at even positions.