use proconio::{fastout, input};

#[fastout]
fn main() {
    input! { t: usize }

    for _ in 0..t {
        let ans = solve();
        println!("{}", if ans { "finite" } else { "infinite" });
    }
}

fn solve() -> bool {
    input! {
        h: usize, w: usize,
        a: [[i32; w]; h],
    }

    for i in 0..h {
        for j in 0..w {
            for ni in 0..i {
                if a[ni][j] + a[i][j] > 0 {
                    return false;
                }
            }

            for nj in 0..j {
                if a[i][nj] + a[i][j] > 0 {
                    return false;
                }
            }

            for d in 0.. {
                let ni = i + d;
                let nj = j.wrapping_sub(d);
                if ni >= h || nj >= w {
                    break;
                }
                if a[ni][nj] + a[i][j] > 0 {
                    return false;
                }
            }

            for d in 0.. {
                let ni = i.wrapping_sub(d);
                let nj = j + d;
                if ni >= h || nj >= w {
                    break;
                }
                if a[ni][nj] + a[i][j] > 0 {
                    return false;
                }
            }
        }
    }

    true
}