I need c program on FLAMES

Question

I think anyone are aware of flames, firstly we need to remove common letters from two different strings and count those characters and using that count we have eliminate each single character in a cyclic manner and print that last remaining character

Answer 1

Thats a pretty easy task even for a beginner(and looks like homework to me). So my opinion is start with the SoloLearn course for c.
Ohh and nobody here is doing the work for you, we are here for helping you solve problems with code or explain you certain functions or mechanics.

Answer 2

To be notified, you cannot code graphics in c in most of online compilers including code playground.