x = exam points (maximum 24)
y = exercise points (maximum 72)
max(9*x,6*x+y) = final points (maximum 216)

Grade   Final points
--------------------
5	185-216
4	158-
3	131-
2	104-
1	 77-
0	  0-76

Student number	x	y	max(9*x,6*x+y)	Grade
-----------------------------------------------------
48433C		11	54      m( 99,120)=120	2
409261		14	54	m(126,138)=138	3
411547		15	55	m(135,145)=145	3
427230		19	72	m(171,186)=186	5
475813		18	70	m(162,178)=178	4
476935		16	70	m(144,166)=166	4
527897		12	69	m(108,141)=141	3
575344		23	72	m(207,210)=210	5
592990		19	43	m(171,157)=171	4
593465		19	72	m(171,186)=186	5
598114		19	65	m(171,179)=179	4
604095		16	68	m(144,164)=164	4
652212		12	56	m(108,128)=128	2
652937		14	69	m(126,153)=153	3
657194		19	70	m(171,184)=184	4
706317		20	68	m(180,188)=188	5
708085		14	55	m(126,139)=139	3
709783		14	70	m(126,154)=154	3
716967		19	55	m(171,169)=171	4
730626		21	71	m(189,197)=197	5
773353		15	57	m(135,147)=147	3
782784		19	67	m(171,181)=181	4
913197		14	63	m(126,147)=147	3
941787		20	67	m(180,187)=187	5
979542		16	60	m(144,156)=156	3
1010170		14	55	m(126,139)=139	3
100042971	22	72	m(198,204)=204	5