BellBoard

5 15 16         231456789
         a      214356978
-     2    )    4132
-     2    )    3124
S     2    ) =A 3142
-  S       )    426153
   S  2    )    4123
-     2    )    2134
         b      213456879
         A      2143
         c      214365978
         A      2134
         b      213465879
         A      2143
a= 1,5,7s,9,10,12s (16 sixes)
b= 3,4,5,6,8,10s (16 sixes)
c= 3,4s,6,8,10s (16 sixes)
For 5031, omit the pair of singles at 15 in one A block (1st part recommended)