c:\test>861961
------                0.. 5
 ------               1.. 6
  ------              2.. 7
   ------             3.. 8
    ------            4.. 9
     ------           5..10
      -----           5.. 0
-      ----           6.. 1
--      ---           7.. 2
---      --           8.. 3
----      -           9.. 4
-----                10.. 5

----                  0.. 3     range: 0 .. 3 is contained by 1 ranges
 ----                 1.. 4     range: 1 .. 4 is contained by 4 ranges
  ----                2.. 5     range: 2 .. 5 is contained by 4 ranges
   ----               3.. 6     range: 3 .. 6 is contained by 3 ranges
    ----              4.. 7     range: 4 .. 7 is contained by 3 ranges
     ----             5.. 8     range: 5 .. 8 is contained by 3 ranges
      ----            6.. 9     range: 6 .. 9 is contained by 2 ranges
       ----           7..10     range: 7 .. 10 is contained by 1 ranges