private int FindSymbolIndex(String sym){
		
		if (sym.equals("$"))
			return Utilities.ProductionEpsilonCode;
		else{
			for (int i = 0; i < mSymbols.size(); ++i){
				if (mSymbols.get(i).mSy.equals(sym)) return i;
			}
			return Utilities.ProductionErrorCode;
		}
	}