#include <iostream>
#include <algorithm>
#include <vector>
#include <cstring>
#define ll long long 
using namespace std;

void solve()
{
	int moxi[11][11];
	vector<string> v;
	int n,m;	cin>>n>>m;
	for(int i=1;i<=n;i++)
		for(int j=1;j<=m;j++)
			cin>>moxi[i][j];

	if(n==1&&m==1)
	{
		cout<<-1<<endl;
		return ;
	}

	v.clear();
	for(int i=1;i<=n;i++)
	{
		string temp="";
		for(int j=1;j<=m;j++)
			temp+=to_string(moxi[i][j]);
		v.push_back(temp);
	}

	string temp=*(v.begin());
	v.erase(v.begin());	v.push_back(temp);

	for(auto e:v)
	{
		char temp=e[0];
		e.erase(e.begin());
		e.push_back(temp);
		for(auto f:e)
			cout<<f<<' ';
		cout<<endl;
	}

}

int main()
{
	ios::sync_with_stdio(false);
	cin.tie(0);	cout.tie(0);

	int t=1;	cin>>t;
	while(t--)	solve();

	return 0;
}

codeforces 说什么 wrong answer Integer parameter [name=a_i_j] equals to 0, violates the range [1, 10] (test case 91)，导致我赛时wa了3 4 发，我没搞懂啊，我这输出和样例一模一样