#include<bits/stdc++.h>
using namespace std;
using UL = unsigned int;
using ULL = unsigned long long;
using LL = long long;
#define rep(i, n) for(UL i = 0; i < (n); i++)

int main() {
 UL N; scanf("%u",&N);
 UL A[200001]; rep(i,N) scanf("%u",&A[i]); A[N]=~0u;
 UL M; scanf("%u",&M);
 UL B[200001]; rep(i,M) scanf("%u",&B[i]); B[M]=~0u;
 UL p=0,q=0;
 while(p+q<N+M){
  if(A[p]<B[q]){ printf("%u\n",A[p]); p++; }
  else if (A[p]>B[q]){ printf("%u\n",B[q]); q++; }
  else { p++; q++; }
 }
 return 0;
}

