What US states have only four letters in their names?

Of total letters, there are three states with four letters:

Iowa

Ohio

Utah

However, there are seven states with only four different letters in the name:

Hawaii (H, A, W, I)

Alaska (A, L, S, K)

Kansas (K, A, N, S)

Mississippi (M, I, S, P)

Alabama (A, L, B, M)

Tennessee (T, E, N, S)

Indiana (I, N, D, A)