javascript scope

scope.js

const a = 1;
const b = 2;
const c = 3;

(function firstFunction() {
  const b = 5;
  const c = 6;
  (function secondFunction() {
    const b = 8;
    (function thirdFunction() {
      const a = 7;
      const c = 9;
      (function fourthFunction() {
        const a = 1;
        const c = 8;
      })();
    })();
  })();
})();
console.log(`a: ${a}, b: ${b}, c: ${c}`);
// wanted output a: 1, b: 8, c: 6