import sys
n = sys.stdin.readline().strip().split()
a = [x for x in map(int,sys.stdin.read().strip().split())]
a = set(a)
a = list(a)
a.sort()
for i in a:
print(i,end="\n")

import sys
n = sys.stdin.readline().strip().split()
a = [x for x in map(int,sys.stdin.read().strip().split())]
a = set(a)
a = list(a)
a.sort()
for i in a:
print(i,end="\n")