js counter 1

function toxy(num){
var strxy="x";
for(var i=0;i<num;i++){
strxy+="y";

}
strxy+="z";
return strxy;
}

function printxytonum(strxy)
{
  var result = "";
  var cur = [0];
  var curidx = 0;
  for(var i = 0;i<strxy.length;i++)
    {
      if(strxy[i] === 'x')// event a
        cur[0]=0;
      else if(strxy[i] === 'y')// event b
        {
         for(var x = 0;true;x++)
         {
           if(cur[x]<9)
           {
             cur[x]++;
             break;
           }else{
             cur[x]=0;
             if(cur[x+1] === undefined)
               cur[x+1]=0;
           }
         }
        }
    }
for(var i = cur.length-1;i>=0;i--){
  result += cur[i].toString();
}
  return result;
}
var xystr = toxy(4888461);
console.log(//xystr, 
  '\n',printxytonum(xystr));