/* function collatzSequence(n) {
    let m = n;
  const arr = [m];
  while (m !== 1) {
    if (m % 2 === 0) {
      m /= 2;
    } else {
      m = (m * 3) + 1;
    }
    arr.push(m);
  }
  return arr;
} */

function nextPalindrome(n) {
   let search = true;
  let m = n + 1;
  while (search) {
    if ((m + '') === (m + '').split('').reverse().join('')) return m;
    m++;
  }
}