d=deque()
for _ in range(int(input())):
    l= input().split()
    (getattr(d, l[0])())if len(l)==1 else (getattr(d, l[0])(l[1]))
print(' '.join(d))

from collections import deque
d = deque()
N = int(input()) #number of operations
for i in range(N):
    oper = list(input().split())   
    if oper[0] == 'append':
        d.append(int(oper[1]))
    elif oper[0] == 'appendleft':
        d.appendleft(int(oper[1]))
    elif oper[0] == 'pop':
        d.pop()
    elif oper[0] == 'popleft':
        d.popleft()
    else:
        print()
print(*d)``

from collections import deque
n = int(input())
d = deque()
for n in range(n):
    cmd = input().split()
    operation = cmd[0]
    if operation == "append":
        d.append(int(cmd[1]))
    elif operation == "appendleft":
        d.appendleft(int(cmd[1]))
    elif operation == "pop":
        d.pop()
    elif operation == "popleft":
        d.popleft()
        
print(*d)
        

from collections import deque

q = deque()
for _ in range( int(input()) ):
    operation, *value = input().split()
    # print(operation, value)
    method = getattr(q, operation)
    method(*value)

print(*q)