var largestLocal = function (grid) {
    let rowLen = grid.length, colLen = grid[0].length
    console.log(rowLen, colLen)
    let mainArr = []
    for (let init = 0; rowLen - init > 2; init++) {
        let childArr = []
        let tem = 0
        for (let col = tem; rowLen - col > 2; col++) {
            let container = []
            for (let sub = init; sub < 3; sub++) {
                let sumTemp = grid[sub].slice(col, 3);
                console.log("sumTemp at ", sub, " is ", sumTemp)
                container.push(...sumTemp)
                console.log("container at ", sub, " is ", container)
            }
            let max = Math.max(...container);
            console.log("max at ", col, " is ", max)
            childArr.push(max)
            console.log("childArr at ", col, " is ", childArr)

        }
        mainArr.push([...childArr])
    }
    return mainArr
};