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#тестовые данные 11 0 0 12 выход - 0 12 или тестовые данные - 1 2 0 3 4 0 5 10 выход - 1 0 3 0 5 10
a = list(map(int, input().split()))

indexes = len(a)

nulles = a.count(0)

must_be = indexes - nulles
def foo(a):

    for i in range(len(a)):
        
        if a[i] == 0 and i != 0 and len(a) != must_be:
            index_delete = i-1
            a.pop(index_delete)
            foo(a)
        elif len(a) != must_be:
            continue
        else:
            break
    #     indexes = len(a)
# while indexes != must_be:
    
#     foo(a)
foo(a)
    
    

print(*a)