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

vector<int> get(int n){
	int t = n;
			vector<int> b;
			rep(i,t/3){
				b.push_back(1);
				b.push_back(1);
				b.push_back(0);
			}
			if(t%3==1)b.insert(b.begin(),0);
			else if(t%3==2){
				b.push_back(1);
				b.push_back(1);
			}
			return b;
	
}

int main(){
	
	int _t;
	cin>>_t;
	
	rep(_,_t){
		int h,w;
		cin>>h>>w;
		
		vector<vector<int>> ans(h,vector<int>(w,0));
		if(h==1||w==1){
			
			auto b = get(max(h,w));
			rep(i,h){
				rep(j,w){
					ans[i][j] = b.back();
					b.pop_back();
				}
			}
			
		}
		else if(h==2||w==2){
			auto b = get(max(h,w));
			if(w==2){
				rep(i,h){
					rep(j,w){
						ans[i][j] = b.back()+1;
					}
					b.pop_back();
				}
			}
			else{
				rep(i,w){
					rep(j,h){
						ans[j][i] = b.back()+1;
					}
					b.pop_back();
				}
			}
		}
		else if((h==3||w==3)&&min(h,w)>=3){
			auto b = get(max(h,w)-2);
			rep(i,h){
				rep(j,w){
					ans[i][j] = 2;
					if(i!=0&&i!=h-1&&j!=0&&j!=w-1){
						ans[i][j] = b.back();
						b.pop_back();
					}
				}
			}
		}
		else{
			cout<<-1<<endl;
			continue;
		}
		rep(i,h){
			rep(j,w){
				if(j!=0)cout<<' ';
				cout<<ans[i][j];
			}
			cout<<endl;
		}
		
	}
	return 0;
}