from collections import deque

if __name__ == '__main__':
    N = int(input())
    d = deque()

    funcs = {
        'append': lambda x: d.append(x),
        'appendleft': lambda x: d.appendleft(x),
        'clear': lambda: d.clear(),
        'count': lambda x: d.count(x),
        'extend': lambda x: d.extend(x),
        'extendleft': lambda x: d.extendleft(x),
        'pop': lambda: d.pop(),
        'popleft': lambda: d.popleft(),
        'remove': lambda x: d.remove(x),
        'reverse': lambda: d.reverse()
    }

    inputs = [input().split() for _ in range(N)]
    for command in inputs:
        funcs[command[0]](*[int(x) for x in command[1:]])

    print(*d)