Let's Hack is a hacking game with a new concept.

You are a hacker who breaks the firewall and gets access to the system.

Your mission is to hack the password and gain access to the system.

Your target is a 5-layer firewall.

You need to be really skilled and have a lot of time to get through the firewall.

The first thing you need to do is to analyze the password.

The idea is that if you find the letters that appear only once on the board, you can enter the password.

You can find the letters in any order.