import java.util.*;
class Main{
    static int N = 10, row, col, totalCnt, pathCnt;
    static int[][] a = new int[N][N];
    static int[][] dir = new int[][]{
        {-2, 1}, {-1, 2}, {1, 2}, {2, 1},
        {2, -1}, {1, -2}, {-1, -2}, {-2, -1}};
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int t = sc.nextInt();
        while(t -- >0){
            row = sc.nextInt(); col = sc.nextInt();
            int x = sc.nextInt(), y = sc.nextInt();
            totalCnt = row * col;
            pathCnt = 0;
            boolean[][] st = new boolean[row][col];
            st[x][y] = true;
            dfs(x, y, st, 1);
            System.out.println(pathCnt);
        }
    }

    public static void dfs(int x, int y, boolean[][] st, int pot){
        if(pot == totalCnt){
            pathCnt++;
            return;
        }
        for(int i = 0; i < 8; i++){
            int nx = x + dir[i][0];
            int ny = y + dir[i][1];
            if(nx < 0 || nx >= row || ny < 0 || ny >= col) continue;
            if(st[nx][ny]) continue;
            st[nx][ny] = true;
            dfs(nx, ny, st, pot + 1);
            st[nx][ny] = false;
        }

    }


}