Targeting a MC inside a MC with a dynamically generated name

programming flash
1

Hi I’m trying to target a movieclip inside another movie clip which I have dynamically generated the name. I hope I’m making sense.

firstText = "text" + randomNum;

_root[firstText].gotoAndStop(9);

firstTitle = _root[firstText + ".title_txt"];
    
TweenLite.to(firstTitle, 0, {tint:0x32bdf3});

The first part works, I can “firstText” and I can make it go to frame 9 and stop but I can’t manipulate the movie clip “title_txt” which is inside “firstText”

Any help would be greatly appreciated. Thanks in advance