10. Letters Change Numbers

function solve(args) {
  const words = args.split(' ');
  const results = [];

  const takeLetterCharCode = (word, letter) => {
    const takeLeftLetterIndex = word.indexOf(letter);
    const takeLetterCode = word.charCodeAt(takeLeftLetterIndex);
    let codeInAlphabet = 0;

    if (takeLetterCode >= 97 && takeLetterCode <= 122) {
      codeInAlphabet += takeLetterCode - 96;
    } if (takeLetterCode >= 65 && takeLetterCode <= 90) {
      codeInAlphabet += takeLetterCode - 64;
    }

    return codeInAlphabet;
  };


  words.forEach((word) => {
    const input = word.split('');
    const leftLetter = input.shift();
    const rightLetter = input.pop();
    let takeNumber = Number(input.join(''));

    if (leftLetter !== undefined && leftLetter === leftLetter.toUpperCase()) {
      takeNumber /= takeLetterCharCode(word, leftLetter);
    } else {
      takeNumber *= takeLetterCharCode(word, leftLetter);
    }

    if (rightLetter !== undefined && rightLetter === rightLetter.toUpperCase()) {
      takeNumber -= takeLetterCharCode(word, rightLetter);
    } else {
      takeNumber += takeLetterCharCode(word, rightLetter);
    }

    results.push(takeNumber);
  });

  const sumResults = results.reduce((acc, curentValue) => acc + curentValue, 0);

  if (!Number.isNaN(sumResults)) {
    console.log(`${sumResults.toFixed(2)}`);
  }
}