#include <bits/stdc++.h>
#include <atcoder/all>
using namespace std;
using namespace atcoder;
typedef int64_t lint;
#define rep(i, n) for(int i=0; i<n; i++)
#define repx(i, l, n) for(int i=l; i<n; i++)
#define all(v) v.begin(), v.end()
#define show(x) cout << #x << ": " << x << endl;
#define list(x) cout << #x << ": " << x << "  ";
#define pb push_back
using vi = vector<lint>;
using vvi = vector<vector<lint>>;
template<class T> inline void vin(vector<T>& v) { rep(i, v.size()) cin >> v.at(i); }
template<class T> inline bool chmax(T& a, T b) { if (a < b) { a = b; return 1; } return 0; }
template<class T> inline bool chmin(T& a, T b) { if (a > b) { a = b; return 1; } return 0; }
template<class T> inline void drop(T x) { cout << x << endl; exit(0); }
template<class T> void vout(vector<T> v) { rep(i, v.size()) { cout << v.at(i) << ' '; } cout << endl; }
constexpr lint LINF = LLONG_MAX/2;

int main() {
	lint T;
	cin >> T;

	lint a=0, b=0, c=0, x, y, z;
	rep(_, T) {
		cin >> x >> y;
		if (x != 1 && x != 3 && y != 1 && y != 3) {
			std::cout << "-1" << '\n';
		} else {
			bool f = false;
			if (x > y) f = true;
			if (f) swap(x, y);
			vvi v(x, vi(y, 2));
			if (x == 1) {
				if (y%3 == 1) {
					rep(i, y) {
						if (i%3 == 0) v[0][i] = 0;
						else v[0][i] = 1;
					}
				} else {
					rep(i, y) {
						if (i%3 == 2) v[0][i] = 0;
						else v[0][i] = 1;
					}
				}
			} else {
				if ((y-2)%3 == 1) {
					rep(i, y-2) {
						if (i%3 == 0) v[1][i+1] = 0;
						else v[1][i+1] = 1;
					}
				} else {
					rep(i, y-2) {
						if (i%3 == 2) v[1][i+1] = 0;
						else v[1][i+1] = 1;
					}
				}
			}
			if (!f) {
				rep(i, x) {
					rep(j, y) {
						std::cout << v[i][j] << ' ';
					}
					std::cout << '\n';
				}
			} else {
				rep(j, y) {
					rep(i, x) {
						std::cout << v[i][j] << ' ';
					}
					std::cout << '\n';
				}
			}
		}
	}
}