Find The Secret Flag

I have been trying to solve this challenge for hours now. I have found the name of the creators and the correct input to be given when you execute the program. I did all this by just analysing the code and bruteforcing it.

However, I am still not able to find the flag. Earlier challenges which I solved had the flag in the format HTB{sometext}. Does this challenge also have the flag in the same format? if not, do I have to combine the correct string and the authors name? I tried a few combination but they didn’t work.

Please help me with this.