Convert the switch statement into an object called lookup code example

Example: basic javascript using objects for lookups

var alpha = {
  1:"Z",
  2:"Y",
  3:"X",
  4:"W",
  24:"C",
  25:"B",
  26:"A"
};
alpha[2]; // "Y"
alpha[24]; // "C"

var value = 2;
alpha[value]; // "Y"