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Jan 22nd, 2017
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  1. function mutation(arr) {
  2. var container = arr[0].toLowerCase();
  3. var letters = arr[1];
  4. letters = letters.toLowerCase().split("");
  5. letters.forEach(function(letter){
  6. if(container.indexOf(letter) === -1){
  7. console.log(container.indexOf(letter));
  8. return false;
  9. }
  10. });
  11. return true;
  12. }
  13.  
  14. mutation(["hello", "Hey"]);
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