from pyliststack import Stack
PROMPT = "Enter and int value (<0 to ending:)"
myStack = Stack()
value = int(input(PROMPT))
while value >= 0:
myStack.push(value)
value = int(input(PROMPT))
while not myStack.isEmpty():
value = myStack.pop()
print(value)
# input 7 13 45 19 28 -1
