function barFem(x){
  var c = 0;
  while (c != x){
     var n = Math.round(Math.random()*9999);
     if (n != 4229){
       if (n < 1000){n = "0" + n;}
       if (n < 100){n = "0" + n;}
       if (n < 10){n = "0" + n;}
       document.write(n + " ");
       }else{
       c--;
       }
     c++;
     }
  }