  15                           5   1-9                                     15         

A B      A    B    A   

⑴A 9   

⑵B  6   

⑶A 4   

⑷B  2       A    

⑸A  7       B    

⑹B 8   

⑺A 5   

⑻B 1   

A    9.7.5.4      3    15   b     8.6.2.1  8+6+1=15   B      1    

                  

                    3    15           15   1-9 3          

 1+5+9=15.1+6+8=15.2+4+9=15.2+5+8=15.2+6+7=15.3+4+8=15.3+7+5=15.4+5+6=15   

       井          井        1   2   3   4    

        3     B 8   B   A 7     B   