remove duplicate clips through array

I'm using beneath code to two areas of clips. On the left 10 clips consisting of 2 columns and 5 rows. On the right the exact duplicate. It starts of with clip 1 on the left, than it's duplicate on the right, then clip 2 on the left, than it's duplicate on the right etc. Until both left and right have the exact same 10 clips in the same order.

Now I've added an event listener. The way I would like it to work is when I click e.g. clip 4 on the left, not only that clip should be removed, but also it's counterpart clip 4 on the right. And the same the other way: clicking clip 4 on the right should remove both the right clip 4 as the left clip 4.

The way I've got it working now is only when clicking clips on the left. That removes that clip and the clip on the right. I'm using the indexOf array way for that. By deleting the clip on that indexOf location, which would be a left clip and the clip on the right by adding 1 to that indexOf. Since in the array the right clip (duplicate) immediately follows the left (original) clip.

Of course that doesn't work the other way, when I click a right clip first. Since I then would have to subtract 1 of the indexOf location to get to the left clip version. But I can't think of a way to determine whether the clip clicked on is on the right area or the left. I've commented that second removeChild line since that doesn't work when clicking on a right clip.

Can anyone thing of a way?

var clipcopies:Array = new Array(); for (var rows:uint=0; rows <5; rows++) {           for (var cols:uint= 0; cols <2; cols++)           {                     for (var cops:uint=0; cops <2; cops++)                     {                               var persona:clips = new clips();                               persona.scaleX = .5;                               persona.scaleY = .5;                               persona.gotoAndStop(cols+1+rows*2);                               persona.x = (cols * (persona.width+20) + 10)+(cops*300);                               persona.y = (rows * (persona.height+20) + 10);                               persona.addEventListener(MouseEvent.CLICK,clickPersona);                               addChild(persona);                               clipcopies.push(persona);                     }           } } function clickPersona(e:MouseEvent):void {           var thisclip:uint = clipcopies.indexOf(e.target);           trace(thisclip);           removeChild(clipcopies[thisclip]);           //removeChild(clipcopies[thisclip+1]); }