text: function passcodeDerivation(arr) {
      var log = String(arr).split(',', 50);
      var ans = "";
      for (;;) {
          var head = [];
          var body = [];
          for (var i in log) {
              var n = log[i][0];
              head[n] = 1;
              for (var j = 1; j < log[i].length; j++) {
                  var n = log[i][j];
                  body[n] = 1;
              }
          }
          var h = "";
          for (var i in head) {
              if (head[i] && !body[i]) {
                  h = i;
                  break;
              }
          }
          if (h == "") {
              return Number(ans);
          }
          ans += h;
          var log2 = [];
          for (var i in log) {
              if (log[i][0] == h) {
                  log[i] = log[i].slice(1);
              }
              if (log[i] != "") {
                  log2.push(log[i]);
              }
          }
          log = log2;
      }    
  }
  
  const keylog = [
    319,680,180,690,129,620,762,689,762,318,368,710,720,710,629,168,160,689,716,731,736,729,316,729,729,710,769,290,719,680,318,389,162,289,162,718,729,319,790,680,890,362,319,760,316,729,380,319,728,716,
  ];
  
  passcodeDerivation(keylog);