#include<bits/stdc++.h>
using namespace std;
constexpr int M=1005,mod=998244353;
int n,m,ans,r[M][M],c[M][M],sumr[M][M],sumc[M][M];
int read(){
	int x=0;char ch=getchar();
	while (!isdigit(ch)) ch=getchar();
	while (isdigit(ch)) x=x*10+ch-48,ch=getchar();
	return x;
}
int rdc(int x){return x>=mod?x-mod:x;}
int main(){
    n=read();m=read();ans=2;
    for (int i=1;i<=n;i++) for (int j=1;j<=m;j++)
        sumr[i][j]=rdc(sumr[i][j-1]+read());
    for (int i=1;i<=n;i++) for (int j=1;j<=m;j++)
        sumc[i][j]=rdc(sumc[i-1][j]+read());
    for (int i=2;i<n;i++) for (int j=2;j<m;j++)
        ans=(ans+1ll*(mod+1-sumr[i+1][j-1])*(mod+1-sumc[i-1][j+1])%mod*sumr[i][j-1]%mod*sumc[i-1][j])%mod;
    printf("%d\n",ans);
    return 0;
}