1  	aaaaa  ⅰ  
      2  	bbbbb  ⅱ  
      3  	ccccc  ⅲ  
      4  	ddddd  ⅲ  
      1  	eeeee  ⅲ  
      2  	fffff  ⅲ  
      3  	ggggg  ⅲ  
      2  	GGGGG  ⅲ