As you can see in the 32 keys piano keys labeled diagram, the first note to the piano's left is C. The next white key is D, followed by E, F, G, A, and B. Label the white notes in C, D, E, F, G, A, B. This keeps repeating till you run out of keys. As the following piano keys label suggests, after B, you go back to C, D, E, and so on. It should be noted here that there is no black key between E and F and between B and C. Followed by E, F, G, A, and B. Label the white notes in the order C, D, E, F, G, A, B. This keeps repeating till you run out of keys.