text: /* Given a non-negative integer, 3 for example, return a string with a murmur: 
  "1 sheep...2 sheep...3 sheep...". 
  Input will always be valid, i.e. no negative integers.
  */
  
  //Solution with the for loop
  var countSheep = function (num){
    let sheep = ``;
    
    for (let i = 1; i <= num; i++){
      sheep += `${i} sheep...`
    }
    return sheep;
  }
  
  //Solution with the '.keys' method which returns the enumerable properties of an array
  countSheep=n=>[...Array(n).keys()].map(x=>`${x+1} sheep...`).join``
  