// Slower C++ solution:
#define _CRT_SECURE_NO_WARNINGS

#include <iostream>

#include <sstream>

#include <iomanip>

#include <cstdio>

#include <cstdlib>

#include <cmath>

#include <cctype>

#include <cstring>

#include <vector>

#include <list>

#include <queue>

#include <deque>

#include <stack>

#include <map>

#include <set>

#include <algorithm>

#include <iterator>

#include <bitset>

#include <ctime>

#include<complex>

using namespace std;



#define FOR(i,a,b) for (int i = (a); i < (b); i++)

#define RFOR(i,b,a) for (int i = (b)-1; i >= (a); i--)

#define ITER(it,a) for (__typeof(a.begin()) it = a.begin(); it != a.end(); it++)

#define FILL(a,value) memset(a, value, sizeof(a))



#define SZ(a) (int)a.size()

#define ALL(a) a.begin(), a.end()

#define PB push_back

#define MP make_pair



typedef long long LL;

typedef vector<int> VI;

typedef pair<int, int> PII;



const double PI = acos(-1.0);

const int INF = 1000 * 1000 * 1000 + 7;

const LL LINF = INF * (LL)INF;



const int MAX = 2 * 1000 * 100 + 47;



int A[MAX];

int B[MAX];



int A1[MAX];

int B1[MAX];

int L[MAX * 2];

int sz;

vector<int> g[MAX];

int IN[MAX];

int OUT[MAX];

int U[MAX];



int val = 0;

void dfs(int v)

{

	if (U[v]) return;

	U[v] = 1;



	if (OUT[v] > IN[v]) val += OUT[v] - IN[v];

	FOR(i, 0, SZ(g[v]))

	{

		int to = g[v][i];

		dfs(to);

	}

}



int main()

{

	//freopen("in.txt", "r", stdin);

	//freopen("out.txt", "w", stdout);

	ios::sync_with_stdio(false); cin.tie(0);

	int n;

	cin >> n;

	FOR(i, 0, n) cin >> A[i];

	FOR(i, 0, n) cin >> B[i];

	



	int y = 0;

	int x = 0;

	FOR(i, 0, n)

	{

		x ^= A[i];

		y ^= B[i];

		A1[i] = A[i];

		B1[i] = B[i];

	}



	A1[n] = x;

	B1[n] = y;

	sort(A1, A1 + n + 1);

	sort(B1, B1 + n + 1);

	bool ok = true;

	FOR(i, 0, n + 1)

	{

		if (A1[i] != B1[i])

		{

			ok = false;

			break;

		}

	}



	if (!ok)

	{

		cout << -1 << endl;

		return 0;

	}



	int ans = 0;

	FOR(i, 0, n)

	{

		if (A[i] != B[i]) ans++;

		L[sz++] = A[i];

		L[sz++] = B[i];

	}



	L[sz++] = x;

	sort(L, L + sz);

	sz = unique(L, L + sz) - L;

	

	FOR(i, 0, n)

	{

		A[i] = lower_bound(L, L + sz, A[i]) - L;

		B[i] = lower_bound(L, L + sz, B[i]) - L;

	}



	x = lower_bound(L, L + sz, x) - L;

	FOR(i, 0, n)

	{

		int a = A[i];

		int b = B[i];

		if (a == b) continue;

		g[a].push_back(b);

		g[b].push_back(a);



		OUT[b]++;

		IN[a]++;

	}



	val = 0;

	dfs(x);

	if (val != 0 && OUT[x] > IN[x]) val--;

	ans += val;



	FOR(i, 0, n)

	{

		//cout << SZ(g[i]) << endl;

		if (U[i] || SZ(g[i]) == 0) continue;



		val = 0;

		dfs(i);

		if (val == 0) val++;

		//cout << i << ": " << val << endl;

		ans += val;

	}



	cout << ans << endl;

}

// Faster C++ solution for the same problem (measured speedup: 6.3632526746456435x):
#include<bits/stdc++.h>

using namespace std;



const int N = 1000 * 100 + 10;

int a[N], b[N], n, par[N * 2], sz[N * 2];



int get_par(int root) {

	return par[root] == root? root: par[root] = get_par(par[root]);

}



void Union(int v, int u) {

	v = get_par(v), u = get_par(u);

	if (v == u)

		return;

	if (sz[u] > sz[v])

		swap(v, u);

	sz[v] += sz[u];

	par[u] = v;

}



int main() { 

	ios::sync_with_stdio(false), cin.tie(0), cout.tie(0);

	int ans = 0;

	cin >> n;

	for (int i = 0; i < n; i++)

		cin >> a[i], a[n] ^= a[i];

	for (int i = 0; i < n; i++)

		cin >> b[i], b[n] ^= b[i];

	map<int, int> cnt;

	for (int i = 0; i <= n; i++)

		cnt[a[i]]++;

	for (int i = 0; i < n; i++) {

		cnt[b[i]]--;

		if (cnt[b[i]] < 0)

			return cout << "-1\n", 0;

	}

	vector<int> vec;

	for (int i = 0; i < n; i++)

		if (a[i] != b[i])

			vec.push_back(a[i]), vec.push_back(b[i]), ans++;

	vec.push_back(a[n]), vec.push_back(b[n]);

	sort(vec.begin(), vec.end());

	vec.resize(unique(vec.begin(), vec.end()) - vec.begin());

	int s = (int)(vec.size());

	for (int i = 0; i < s; i++)

		par[i] = i, sz[i] = 1;

	for (int i = 0; i <= n; i++) 

		if (a[i] != b[i]) {

			a[i] = lower_bound(vec.begin(), vec.end(), a[i]) - vec.begin();

			b[i] = lower_bound(vec.begin(), vec.end(), b[i]) - vec.begin();

			Union(a[i], b[i]);

		}

	for (int i = 0; i < s; i++)

		if (get_par(i) == i)

			ans++;

	cout << ans - 1 << '\n';

	return 0;

}