text: var a = 1, b = 2, c = 3;
  
  (function firstFunction() {
    var b = 5, c = 6;
  
    (function secondFunction() {
      var b = 8;
      console.log(`a: ${a}, b: ${b}, c: ${c}`);
      (function thirdFunction() {
        var a = 7, c = 9;
  
        (function fourthFunction() {
          var a = 1, c = 8;
        })();
      })();
    })();
  })();
  