function wordInMatrix(matrix: string[][], word: string): boolean {
  const cols = matrix[0].length;
  for (let c = 0; c < cols; c++) {
    const column: string[] = [];
    for (let r = 0; r < matrix.length; r++) {
      column.push(matrix[r][c]);
    }
    if (column.join("").includes(word)) {
      return true;
    }
  }
  return matrix.some(element => element.join("").includes(word));
}

// No modificar: necesario para evaluar el resultado.
export { wordInMatrix };