u/AD3LRAM

I have a question. I don't know if this question belongs here or not.

In English consonants, there are some repeated sounds so i try to remove those and only take the unique sounds.

So i got -

B D F H J K L M N P R S T V W Y Z

But then I realized there were no letters for (ㅊ)(छ)(cha)/ (خ)(ခ)(kha)/ (ञ)(ည)(nya) and (หง)(ngya).

Are there any other unique sounds and alphabets?