Circular Sentence

export function isCircularSentence(sentence: string): boolean {
  const n = sentence.length;
 
  if (sentence[0] !== sentence[n - 1]) {
    return false;
  }
 
  for (let i = 0; i < n; i++) {
    if (sentence[i] !== ' ') continue;
    if (sentence[i - 1] !== sentence[i + 1]) {
      return false;
    }
  }
 
  return true;
}