Notes:
3rd/4th year could be better, but at least this is A solution
### = not suitable for use of 1.1
1 1.1 = maybe/definitely 1.1
s S   =			a small lecture
L lab = 		a lab (14 2-hour slots in total, but only 13 needed)
This leaves 23 possible 1.1 slots for 1st + 2nd years, of which 22 are needed.

This timetable is nearly fixed, so we just have to make sure we can satisfy
the remaining constraints for individual modules at the bottom of the page.
I will mark & count possible slots to try to make sure they can be satisfied.
This shows that I can make nearly any choices of lab slots without disrupting
the lectures, so I just have to concentrate on "nice" choices & modules
taken by more than 1 year (CS131, CS104).

sem1	|  1st year	111111	|  2nd year	2222222	|  3rd/4th year	
	|sbmx	activity030002	|sbmxe	activity3000124	|sbmiex	activity
------------------------411231------------------4815111------------------------
M9	|....	L		|.....	L		|......	s	
M10	|....	L1	??++++	|....E	L1	..+++	|..1..X	s	
M11	|.bMX	L		|..2.E	1.1	...++	|..4..X	s	
 M12	|.bMX	L		|..M.E	### s	.....+.	|..4...	s	
 M1	|."""	L		|..".e	### s	.....++	|..".e.	lunch	
M2	|..m.	1.1	....++	|..M..	### s	.....+.	|...i..	s	
M3	|..M.	 1	.?..++	|..7..	L1	.+.++	|...i.X	s	
M4	|SB.X	###		|s..x.	L###		|.....X	1.1	7/10

T9	|....	lab		|..M..	###		|...i..	1.1	7/10
T10	|S..X	lab		|.....	1.1	+++++	|.B2i..	s ###	
T11	|S..x	lab		|..5..	1.1	.+.++	|.B.i..	s ###	
 T12~1.1|S...	lab		|.B...	lunch		|...i..	lunch	visit
 T1	|"...	lunch		|."..e	lab		|...ie.	1.1	7/10
T2	|....	1.1	++++++	|S...E	lab		|SBMiE.	###	
T3	|.bMX			|S.M.E	lab		|SBMiE.	###	visit
T4	|.b.X			|S...E	lab		|.B.i..	s	visit

W9	|....	L1	??++++	|.....	L1s	+++++++	|..3i..	s	
W10	|...x	L1	??++++	|..6X.	L1s	...++++	|..2i..	s	
W11	|...X	L1	??++++	|..7..	L1s	.+.++++	|..4i.X	s	
W12	|...X	L1	??++++	|.....	L1s	+++++++	|...i..	s	

R9	|..MX	1	.+..++	|.....	lab		|..3...	s	
R10	|...X	1.1	++++++	|S..X.	lab		|..3...	s	
R11	|...x	1.1	++++++	|S.3..	lab		|..1...	s	
 R12~1.1|".."	lunch		|S.5..	lab		|..4...	lunch	visit
 R1 ~1.1|S..x	lab (151lab)	|".".e	lunch		|..".e.	s ###	
R2	|Sb.x	lab (151lab)	|s..XE	###		|......	1.1	7/10
R3	|Sb.X	lab		|....E	1.1	..+++	|.B3i..	s	visit
R4	|...X	lab		|....E	1.1	..+++	|.B3i..	s	visit

F9	|...X	L1	??++++	|.....	L1	+++++	|..3...	s	
F10	|...X	L1	??++++	|.B5.E	L###		|..4...	s	
F11	|...X	 1	..++++	|..7.E	 1s	...++++	|S.MiE.	###	
 F12	|..M.	 1	....++	|....E	 1s	..+++++	|S.MiE.	###	
 F1	|..".	 1	....++	|....e	 1s	+++++++	|".""e.	lunch	
F2	|...X	 1	..++++	|..7..	 1s	.+.++++	|..3i..	s	
F3	|....	L1	??++++	|..7..	L1s	.+.++++	|.B.i..	s ###	
F4	|....	L		|.....	L		|.B....	s ###	
			119 4			58719
			11  1			   1
use of 1.1:
	 SBM.	 CS101		 SBMXE	CS234		 SB3...	CS307
	 SBM.	 CS102		 SB7xE	CS208		 SB5...	CS310
	 SBM.+S2 CS104		 SBM..	CS201
	 SB..	 CS103		 Sb1..	CS205
	 SB..	 CS121		 SB0..	CS211
	 SB..+M2 CS131
		CS104 & CS131 at same time as 2nd year lab
small CS lectures:					(24)
				 S....	CS221		 S?1?..	CS304
				 SB2..	CS241		 S?3?.X	CS332