#include<bits/stdc++.h>
using namespace std;
//#include<atcoder/all>
//using namespace atcoder;
using ll = long long int;
using ull = unsigned long long int;
using ld = long double;
constexpr ll MAX = 2000000000000000000;
constexpr ld PI = 3.14159265358979;
constexpr ll MOD = 998244353;//2024948111;
ld dotorad(ld K){return PI * K / 180.0;}
ld radtodo(ld K){return K * 180.0 / PI;}
mt19937 mt;
void randinit(){srand((unsigned)time(NULL));mt = mt19937(rand());}
ll modpow(ll A,ll B,ll M){
    ll r = 1,p = A;
    while(B > 0){
        if(B % 2 == 1) r = (r * p) % M;
        p = (p * p) % M;
        B /= 2;
    }
    return r;
}
int main(){
    ll N,M;
    cin >> N >> M;
    vector<ll> A(N),B(M);
    for(ll i = 0;i < N;i++) cin >> A[i];
    for(ll i = 0;i < M;i++) cin >> B[i];
    ll x = 0;
    for(ll i = 0;i < N;i++) x ^= A[i];
    for(ll i = 0;i < M;i++) x ^= B[i];
    if(x != 0) cout << 0 << endl;
    else{
        ll ans = 1;
        for(ll i = 0;i < 20;i++){
            ans *= modpow(2,(N - 1) * (M - 1),MOD);
            ans %= MOD;
        }
        cout << ans << endl;
    }
}