private ArrayList<String> getDifferentVariable(String str1, String str2) {

		ArrayList <String> result=new ArrayList <String>();
		char[] char1=str1.toCharArray();
		char[] char2=str2.toCharArray();
		
		int index=0;
		boolean breakOut=false;
		for (int i=0; i<char1.length; i++)
		{
		//	//System.out.println("index = "+index);
			if (index==char2.length)
			{
				breakOut=true;
				break;
			}
		//	//System.out.println(char1[i]+" and "+char2[index]);
			
			if (char1[i]!=char2[index])
			{
				result.add(""+char1[i]);
				index--;
		//		//System.out.println("EEEE "+char1[i]);
			}
			index++;
		}
		if (breakOut)
		{
			for (int i=index; i<char1.length; i++)
			{
				result.add(""+char1[i]);
			}
		}
		return result;
	}