如何从文字游戏中找到的字母中过滤数组？

function filterLettersFromGameString(gameString) {
  let filteredArray = [];
  
  for (let i = 0; i < gameString.length; i++) {
    const char = gameString[i];
    
    if (/[a-zA-Z]/.test(char)) {
      filteredArray.push(char);
    }
  }
  
  return filteredArray;
}

const gameString = "A1B2C3D4E5";
const filteredLetters = filterLettersFromGameString(gameString);
console.log(filteredLetters);