array = [int(i) for i in input().split(' ')]
quantity = 0
while quantity < len(array):
    if quantity == 0:
        quantity += 1
    else:
        if array[quantity] == 0:
            array.pop(quantity - 1)
        else:
            quantity += 1
for i in range(len(array)):
    if i == len(array):
        print(array[i])
    else:
        print(array[i], end = ' ')