closed Premium letters for CVCV domains

[SPADOMAINS]

Hello, I think that the best letters for LLL domains are A, B, C, D, E, F, G, H, I, L, M, N, O, P, R, S, T, but looking for the best letters for CVCV domains (that the important is that they are pronounceable and good for remember and sound well) I think the best ones are A, B, C, D, E, F, G, I, L, M, N, O, P, R, S, T, without the "H" because in this type of domains I think it is not good because of the pronounceable, and V not good too because of the confuse with B in the pronounce, then which letters you think can be the best in order for this type of domains? I think can be the U, then X and W or Z (they sound well)...and the worsts K,Q and Y...

What do you think about??