COPYRIGHT ? 2023 HOKKAIDO UNIVERSITY OF EDUCATION all rights reserved.
 
    



 
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	    
 
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	     
	    COPYRIGHT ? 2023 HOKKAIDO UNIVERSITY OF EDUCATION all rights reserved.