import java.io.PrintWriter;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int t = sc.nextInt();
		PrintWriter pw = new PrintWriter(System.out);
		for (int z = 0; z < t; z++) {
			int h = sc.nextInt();
			int w = sc.nextInt();
			int[][] a = new int[h][w];
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					a[i][j] = sc.nextInt();
				}
			}

			boolean flg = false;
			label:
			for (int i = 0; i < h; i++) {
				for (int j = 0; j < w; j++) {
					int v = a[i][j];
					for (int i2 = 0; i2 < h; i2++) {
						if (v + a[i2][j] > 0) {
							flg = true;
							break label;
						}
					}
					for (int j2 = 0; j2 < w; j2++) {
						if (v + a[i][j2] > 0) {
							flg = true;
							break label;
						}
					}
					int end = Math.min(h - i, w - j);
					for (int k = 1; k < end; k++) {
						if (v + a[i + k][j + k] > 0) {
							flg = true;
							break label;
						}
					}
					end = Math.min(h - i, j + 1);
					for (int k = 1; k < end; k++) {
						if (v + a[i + k][j - k] > 0) {
							flg = true;
							break label;
						}
					}
				}
			}
			if (flg) {
				pw.println("infinite");
			} else {
				pw.println("finite");
			}
		}
		pw.flush();
		sc.close();
	}
}