#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
	ios::sync_with_stdio(0);
	cin.tie(0);
	cout.tie(0);
	int n,m,i,t,j,u;
	cin>>t;
	while (t--){
		u=1;
		cin>>n>>m;
		if (m%2==0){
			for (i=0;i<n;i++){
				for (j=0;j<m;j++){
					cout<<u+j<<" ";
				}
				u+=m;
				cout<<"\n";
			}
		}
		else{
			for (i=0;i<n;i++){
				cout<<u<<" ";
				for (j=1;j<=m/2;j++){
					cout<<u+j*2<<" "<<u+j*2-1<<" ";
				}
				u+=m;
				cout<<"\n";
			}
		}
	}
}