#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;
	cin>>t;
	while (t--){
		int u=1;
		cin>>n>>m;
		for (i=1;i<=n;i++){
			if (i%2){
				cout<<u<<" ";
				for (j=2;j<=m;j++){
					cout<<u+m+1-j<<" ";
				}
				cout<<"\n";
			}
			else{
				for (j=1;j<=m;j++){
					cout<<u+m-j<<" ";
				}
				cout<<"\n";
			}
			u+=m;
		}
	}
}