02. X-Removal

function solve(input) {
    let matrix = input.map(row => row.toLowerCase().split(""));
    let resultMatrix = input.map(row => row.split(""));

    for (let row = 0; row < matrix.length - 2; row++) {
        for (let col = 0; col < matrix[row].length - 2; col++) {
            let el = matrix[row][col];
            if (el == matrix[row][col + 2] &&
                el == matrix[row + 1][col + 1] &&
                el == matrix[row + 2][col] &&
                el == matrix[row + 2][col + 2]) {

                resultMatrix[row][col]="";
                resultMatrix[row][col + 2]="";
                resultMatrix[row + 1][col + 1]="";
                resultMatrix[row + 2][col]="";
                resultMatrix[row + 2][col + 2]="";
            }
        }
    }
    for (let r of resultMatrix) {
        console.log(r.join(""));
    }

}