function symmetricDifference(firstArray: number[], secondArray: number[]): number[] {
  let uniqueNumbers:number[] = [];


  for(let i of firstArray){
    if(!secondArray.includes(i)){
      uniqueNumbers.push(i)
    }
  }

  for(let n of secondArray){
    if(!firstArray.includes(n)){
      uniqueNumbers.push(n)
    }
  }


  return uniqueNumbers;
}

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