function ArrayChallenge(arr) {
  // __define-ocg__
  const varOcg = "k8gay3w604";

  // calculate the rotate point
  const rotatePoint = arr[0] % arr.length;

  // rotate the array
  const rotatedArray = arr.slice(rotatePoint).concat(arr.slice(0, rotatePoint));

  // create the output string
  const outputString = rotatedArray.join("");

  // intersperse the ChallengeToken
  let finalOutputString = "";
  for (let charNumber = 0; charNumber < outputString.length; charNumber++) {
    finalOutputString += outputString[charNumber];
    if (charNumber < varOcg.length) {
      finalOutputString += varOcg[charNumber];
    }
  }

  // Append remaining characters from ChallengeToken if any
  if (varOcg.length > outputString.length) {
    finalOutputString += varOcg.slice(outputString.length);
  }

  // end of the function
  return finalOutputString;
}

// Examples
console.log(ArrayChallenge([3, 2, 1, 6])); // Output: 6321
console.log(ArrayChallenge([4, 3, 4, 3, 1, 2])); // Output: 124343