#include <stdio.h>
#include <bits/stdc++.h>
#include <atcoder/all>
using namespace atcoder;
using mint = modint998244353;
using namespace std;
#define rep(i,n) for(int i=0;i<(n);i++)
#define Inf 1000000001

int n,m;

mint get(vector<int> a,vector<int> b){
	int t = 0;
	rep(i,n)t ^= a[i];
	rep(i,m)t ^= b[i];
	if(t==1)return 0;
	long long L = n-1;
	L *= m-1;
	mint x = mint(2).pow(L);
	return x;
}

int main(){
	
	cin>>n>>m;
	
	vector<int> a(n),b(m);
	rep(i,n)cin>>a[i];
	rep(i,m)cin>>b[i];
	
	mint ans = 1;
	rep(i,20){
		vector<int> aa(n),bb(m);
		rep(j,n)aa[j] = (a[j]>>i)&1;
		rep(j,m)bb[j] = (b[j]>>i)&1;
		ans *= get(aa,bb);
	}
	
	cout<<ans.val()<<endl;
	
	return 0;
}