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from collections import deque
n = int(input())
d = deque()
for _ in range(n):
command = input().strip().split()
method = getattr(d,command[0])
if len(command)==2:
method(command[1])
else:
method()
for i in d:
print(i,end=' ')
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Collections.deque()
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from collections import deque n = int(input()) d = deque()
for _ in range(n): command = input().strip().split() method = getattr(d,command[0]) if len(command)==2: method(command[1]) else: method() for i in d: print(i,end=' ')