I'm not sure if I understand, but do you want to have an array containing alif and ba and then check if the movieclip is in that array? This is how you would do that:
var scoreIncreasers:Array = [alif, ba];
var isScoreIncreaser:Boolean = (scoreIncreasers.indexOf(objeck) !== -1);
if(isScoreIncreaser) {
// Increase score
}
Edit:
Based on your comment, I think this is what you want:
var objBener:Array = [alif, ba];
if(objBener.indexOf(objek) !== -1) {
//yg perlu diganti
}