As you can see in picture basic operation splits the plaintext block into two equal pieces and applies round function F to one half on each round.

In your round function you can use opearations like:

-   Y = X ^ V

-    Y = Table [X, V

- Y = X <<V

- cyclic shift to left

- cyclic shift to right

- Y = X >>V

- Y = (X * V) % Math.Pow(2, N)

We set Block Size to 32 bits, so we should create round function F that gets 16 bits positive integer and returns the same data type.

Lets implement simple round function like: