function insertDashes(arr) {
  // Array to store words updated with dashes 
  let dashWords = [];

  // Split given words by spaces 
  words = (arr.split(' '));

  // Iterate through list of words
  for (let word of words) {
    // New string to store updated word with dashes
    let dashWord = "";
    // Iterate through letters and add dash
    for (let i = 0; i < word.length; i ++) {
      if (i < word.length - 1) {
        dashWord += word[i] + "-";
      } 
      // Don't add dash after last letter in word 
      else {
        dashWord += word[i];   
      }
    }
    // Push dash word to array
    dashWords.push(dashWord);
  }
  // Join two words into string and return
  return dashWords.join(' ');       
}



/**
* Test Suite 
*/
describe('insertDashes()', () => {
    it('insert dashes in between chars', () => {
        // arrange
        const value = "aba caba";
        
        // act
        const result = insertDashes(value);

        // log
        console.log("result: ", result);
        
        // assert
        expect(result).toBe("a-b-a c-a-b-a");
    });
});