I have no clue and I just want to know what it even means as this hasnt been talked in any of my classes. Can someone help me!

 The question:

Using Peter Higginson's Little Man Computer implementation with the following program:

If the user enters 23, 67, 32, 0

Blank #1: What will be the value in address 1 the first time the BRZ instruction at address 2 is reached?

Blank #2: What will be the value in the accumulator the first time the SUB instruction at address 4 is reached?

Blank #3: What will be the value in address the accumulator the first time the STA instruction at address 5 is reached?

Blank #4: What will be the value in address 1 the second time the BRZ instruction at address 2 is reached?

input   inp
here    sta 99
        brz there
        lda here
        sub one
        sta here
        bra input
there   lda 99
        brz done
        out
        lda there
        sub one
        sta there
        bra there
done    hlt
one     dat 1