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from collections import deque
n = int(input())
d = deque()
for i in range(n):
command,*args = input().split()
if args:
getattr(d,command)(int(args[0]))
else:
getattr(d,command)()
print(' '.join(map(str,d)))
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Collections.deque()
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from collections import deque n = int(input()) d = deque() for i in range(n): command,*args = input().split() if args: getattr(d,command)(int(args[0])) else: getattr(d,command)() print(' '.join(map(str,d)))