We may add these three subdivisions to the group with no parallels:

 

1-3 parallels 3
4-6 no parallels 5 marks 6 12
7-9
10-12 6 marks 3
13-15 twice 6 marks, once 4 marks 3
1-15 number of subdivisions 15

Or with more order we can describe G like this:

1-3 parallels 3 16
4-6 no parallels 5 marks 6 12 30 60
7-9
10-12 6 marks 5 30
13-14
15 4 marks 1 4
1-15 number of subdivisions resp number of marks 15 80

Similarly we may describe K like this:

1-3 parallels 3 ?
4-6 no parallels 6 12 4 20
7-9 16
10-12 6 15 15
13-15 0
1-15 number of subdivisions resp number of marks 15 ?

If the first ?-mark had 5, then the second ?-mark would have 40, or half 80.