Rosetta Code: Generate lower case ASCII alphabet

What is your hint or solution suggestion?

function lascii(cFrom, cTo) {
// initiate array to store letters.
  let letters = [];
// store ascii values in two variables.
  var sLetter = cFrom.charCodeAt(0);
  var eLetter = cTo.charCodeAt(0);
//iterate through for loop push the letters from ascii values
  for (let i = sLetter; i<=eLetter; i++){
    letters.push(String.fromCharCode(i));
  }
  return letters;
}
lascii("a","d");

Challenge: Generate lower case ASCII alphabet

**Link to the challenge:

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