text: function twoStrings(s1, s2) {
    for (let i = 0; i < s1.length; i++) {
      if (s2.includes(s1[i])) {
        return 'YES';
      }
    }
    return 'NO';
  }
  
  console.log('twoStrings(s1, s2)', twoStrings('hello', 'world'));
  console.log('twoStrings(s1, s2)', twoStrings('hi', 'world'));
  