public boolean sRight(){
		boolean change = false;
		
		//i -> y | j -> x
		for (int i = 0 ; i < 4 ; i ++){
			for (int j = 3; j > -1 ; j--) {
				//System.out.println("sRight> i: " + i + " j: " + j);
				boolean tmp = mRight(j, i);
				if (tmp == true)
					change = true;
			}
			if(aRight(i))
				change = true;
		}
		if (change){
			//System.out.println(change);			//debug
			genTile();
		}
		return change;
	}