iteration_for_the_1st_while_cycle = 0
empty_list_1 = 
n = int(input())
while iteration_for_the_1st_while_cycle < n:
	cycle_input_number_1 = int(input())
	empty_list_1.append(cycle_input_number_1)
	iteration_for_the_1st_while_cycle += 1
empty_list_1.sort()
iteration_for_the_2nd_while_cycle = 0
n_2 = int(input())
empty_list_2 = 
while iteration_for_the_2nd_while_cycle < n_2:
	cycle_input_number_2 = int(input())
	empty_list_2.append(cycle_input_number_2)
	iteration_for_the_2nd_while_cycle += 1
empty_list_2.sort()
sum_lists=empty_list_1+empty_list_2
sum_lists.sort()
empty_list_3=
for i in sum_lists:
	if sum_lists.count(i)>0 and sum_lists.count(i)<=1:
		continue
	
	else:
		sum_lists.pop(i)
		empty_list_3.append(i)
		
result=empty_list_3
empty_list4=
for i in result:
	empty_list4.append(str(i))
get_the_list_from_cycle_for=empty_list4
get_string_from_list=" ".join(get_the_list_from_cycle_for)
print(get_string_from_list)

 for i in sum_lists:
	if sum_lists.count(i)>0 and sum_lists.count(i)<=1:
		continue
	
	else:
		sum_lists.pop(i)
		empty_list_3.append(i)