a = [int(i) for i in input().split()]

start = 0
end = len(a)
while True:
    try:
        index = a.index(0, start, end)
    except ValueError:
        break
    else:
        if index != 0:
            a.pop(index - 1)
            start = index
        start = index + 1
        end = len(a)

print(*a)