将字符串变为数字，忽略因子的字母顺序

function convertStringToNumber(str) {
  const letterToNumberMap = {
    a: 1,
    b: 2,
    c: 3,
    // 映射关系继续...
  };

  // 移除非字母字符
  const lettersOnly = str.replace(/[^a-zA-Z]/g, '');

  // 排序字母
  const sortedLetters = lettersOnly.split('').sort().join('');

  let result = 0;
  for (let i = 0; i < sortedLetters.length; i++) {
    const letter = sortedLetters[i].toLowerCase();
    result += letterToNumberMap[letter];
  }

  return result;
}

const inputString = "acb12";
const result = convertStringToNumber(inputString);
console.log(result); // 输出6