I don't understand the final instruction

Tell us what’s happening:

Your code so far

// Only change code below this line
var a = 5;
var b = 10;
var c = "I am a";

// Only change code above this line

a = 5 + 1;
b = b + 5;
c = c + " String!";

Your browser information:

User Agent is: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.83 Safari/537.36.

Challenge: Understanding Uninitialized Variables

Link to the challenge:

you have changed code below this line
reset your code, write again the code, and you will pass

Thanks ieahleen, it worked.