Please classify each of the following as numbers or letters: 1, A, 5, B, C, D, 99, 88, -2, Z, E, 4
These are numbers: 1, 5, 99, 88, -2, 4.
These are letters: A, B, C, D, Z, E.
Instruction: Please classify each of the following as numbers or letters: 1, A, 5, B, C, D, 99, 88, -2, Z, E, 4
Context: 
Response: These are numbers: 1, 5, 99, 88, -2, 4.
These are letters: A, B, C, D, Z, E.