Undefined Variable

Hello,
I am trying to dynamically stop a series of movie clips using the code below. The problem I am having is that I am getting an “undefined” error when I try to trace trans*. Is this not the proper way to evaluate the * variable? Can anyone tell me how this would be done?
Thanks!

var trans = 2
for (i = 1; i<=trans; i++) {
_root.trans*.stop();
trace(trans*);
}
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