Final Exam 03. The Isle of Man TT Race Alternative

function solve(input) {
  for (let line of input) {
    let pattern = /^([#$%*&])([A-Za-z]+)\1=(\d+)!!([\w\W]*?)$/g;
    let tokens = pattern.exec(line);

    if (tokens !== null) {
      let [ racer, length, encryptedCode ] = tokens.slice(2);
      length = Number(length);

      if (length === encryptedCode.length) {
        let decryptedCode = decryptCode(encryptedCode, length);
        console.log(`Coordinates found! ${racer} -> ${decryptedCode}`);
        break;
      } else {
        console.log('Nothing found!');
      }
    } else {
      console.log('Nothing found!');
    }
  }

  function decryptCode(encrypted, length) {
    let decryptedCode = '';

    for (let i = 0; i < encrypted.length; i++) {
      let ascii = encrypted.charCodeAt(i);
      ascii += length;
      decryptedCode += String.fromCharCode(ascii);
    }

    return decryptedCode;
  }
}