1. Once connected, we will check the emoji -> number relation in option 1, and record it into a dictionary.
2. We then start the exam.
3. Once supplied with an equation, we do some string manipulation to extract the emojis and arithmetic operations, and translate the emojis into numbers.
4. We evaluate the equation, and supply the answer as number.
5. We repeat step 3 and 4 500 times to get the flag.

Original writeup (https://kblagoev.com/blog/alien-camp-cyberapocalypse-2021-ctf/).