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=' ')