You have 4 attempts to hack successfully. Try 3 times, bail out, then try again; repeat this process.
If you move your cursor throughout the symbols, occasionally you will highlight a group of symbols. Choosing these "duds" will remove one of the words that is wrong from your choices. Also, it may grant you an extra attempt if you have already gotten a selection wrong.
Search around both fields to find a string of symbols that you can enter as the password. It starts with "(", "