#include <bits/stdc++.h>
#include "hieroglyphs.h"
using namespace std;
#define ll long long
#define vl vector<ll>
#define all(aaa) aaa.begin(), aaa.end()
#define ff(aa, bb, cc) for(ll aa = bb; aa < cc; aa++)
#define vb vector<bool>
#define ed "\n"
#define pb push_back
#define pll pair<ll, ll>
#define fi first
#define se second
std::vector<int> ucs(std::vector<int> A, std::vector<int> B){
	if(A == B){
		return A;
	}
	else{
		return {-1};
	}
  return std::vector<int>();
}
	/*
int main() {
  int N, M;
  assert(2 == scanf("%d%d", &N, &M));
  std::vector<int> A(N), B(M);
  for (int i = 0; i < N; i++)
    assert(1 == scanf("%d", &A[i]));
  for (int j = 0; j < M; j++)
    assert(1 == scanf("%d", &B[j]));
  fclose(stdin);
  std::vector<int> R = ucs(A, B);
  int T = (int)R.size();
  printf("%d\n", T);
  for (int i = 0; i < T; i++)
    printf("%s%d", (i == 0 ? "" : " "), R[i]);
  printf("\n");
  fclose(stdout);
  return 0;
}*/
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