public static String[] getConvertableUnits(String myUnit){
		String[] a = {};
		if(length.contains(myUnit))
			return  length.toArray(a);
		if(mass.contains(myUnit))
			return mass.toArray(a);
		if(capacity.contains(myUnit))
			return capacity.toArray(a);
		if(area.contains(myUnit))
			return area.toArray(a);
		if(speed.contains(myUnit))
			return speed.toArray(a);
		if(force.contains(myUnit))
			return force.toArray(a);
		if(current.contains(myUnit))
			return current.toArray(a);
		if(tension.contains(myUnit))
			return tension.toArray(a);
		if(energy.contains(myUnit))
			return energy.toArray(a);
		return power.toArray(a);
	}