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 = ' ')