An Exercise (p.311 text)

Suppose that the input word for the program we just described is DAHL. List all activations of the push and pop functions, in the order in which they are executed, and indicate the character that is pushed or popped. What is the output?

Suppose that the input word for the program we just described is DAHL. List all activations of the push and pop functions, in the order in which they are executed, and indicate the character that is pushed or popped. What is the output?