import sys info_list = [int(k) for k in input().split(' ')] lb_list = [info_list[1]] for i in range(1,info_list[0]): lb_index = lb_list.index(info_list[1+i*2]) if lb_index+1 >= len(lb_list): lb_list.append(info_list[i*2]) else: lb_list.insert(lb_index+1,info_list[i*2]) del_value = info_list[-1] end_list = [i for i in lb_list if i != del_value] for i in end_list: print(i,end=' ')