For the given pseudocode, which XXX and YYY will output the sum of the input integers (stopping when -1 is input)? Choices are in the form XXX / YYY.
val = Get next input
XXX
While val is not -1
YYY
val = Get next input
Put sum to output
sum = val / sum = val
sum = val / sum = sum + val
sum = 0 / sum = sum + val
sum = 0 / sum = val
sum = 0 / sum = sum + val