Tell us what’s happening:
Your code so far
function mutation(arr) {
var a=arr[0].toLowerCase().split("");
var b=arr[1].toLowerCase();
for(var i=0;i<b.length;i++){
if(a.indexOf(b[i].split(""))!==-1){ return true;}
return false;
}
}
mutation(["hello", "hey"]);```
**Your browser information:**
Your Browser User Agent is: ```Mozilla/5.0 (X11; Ubuntu; Linux x86_64; rv:57.0) Gecko/20100101 Firefox/57.0```.
**Link to the challenge:**
https://www.freecodecamp.org/challenges/mutations