n=input() l1=map(int,input().split()) m=input() l2=map(int,input().split()) a=set() b=set() for i in l1: a.add(i) for i in l2: b.add(i) c=a&b d=a|b e=a-c c1=sorted(c) d1=sorted(d) e1=sorted(e) for i in c1: print("%d " % i,end="") print() for i in d1: print("%d " % i,end="") print() for i in e1: print("%d " % i,end="")