```while True:
try:
arr = list(map(int, input().split(' ')))
arr_fst = arr[1]
arr_lst = arr[2:-1]
arr_del = arr[-1]
tmp = [arr_fst]
for i in range(0, len(arr_lst), 2):
a, b = arr_lst[i], arr_lst[i+1]
c = tmp.index(b)
tmp.insert(c+1, a)
tmp.remove(arr_del)
print(' '.join([str(x) for x in tmp]))
except:
break