solution.js

/**
 * @param {string} sentence1
 * @param {string} sentence2
 * @return {boolean}
 */
var areSentencesSimilar = function (sentence1, sentence2) {
  // Helper function to split a sentence into words
  const splitWords = (sentence) => sentence.split(" ");

  // Split both sentences into arrays of words
  let words1 = splitWords(sentence1);
  let words2 = splitWords(sentence2);

  // Ensure words1 is the longer sentence
  if (words1.length < words2.length) [words1, words2] = [words2, words1];

  let start = 0,
    end = 0;
  let n1 = words1.length,
    n2 = words2.length;

  // Compare from the start
  while (start < n2 && words1[start] === words2[start]) start++;

  // Compare from the end
  while (end < n2 && words1[n1 - end - 1] === words2[n2 - end - 1]) end++;

  // Check if the remaining unmatched part is in the middle
  return start + end >= n2;
};