nums = input().split()
size = int(nums[0])  # 输入空间大小
n = int(nums[1]) # 输入操作次数
queue = []  # 队列
for _ in range(n):
    op = input().split()  # 分割操作字符串
    if op[0] == "push":
        if len(queue) < size:
            queue.append(int(op[1]))  # 加入队尾
        else: print("full")
    elif op[0] == "pop":
        if not queue:
            print("empty")
        else:
            print(queue.pop(0))  # 输出队首(出队)
    elif op[0] == "front":
        if not queue:
            print("empty")
        else:
            print(queue[0])  # 输出队首(不出队)