a,b,null,null,c,null - 65 66 0 2 67 0 0 0
a,b,null,c              - 65 66 0 1 67 0 0

This says the first one is bigger but if we don't write the count instead only write those many nulls
a,b,null,null,c,null - 65 66 0 0 67 0 0 0
a,b,null,c              - 65 66 0 67 0 0
This means 2nd one is bigger.
So we need the count of the nulls  but should the seperator be there?