Just keep track and make your best call on putting two pairs together.
I track in software which is a help with the pencil and paper.
I have the 15 code pair in a due situation. That will make the 08-09-18-19 lottery pairs.

c
o
d
e___lott #

1___0-1
2___2-3
3___4-5
4___6-7
5___8-9

code__pairs

111__11
112__11-12
113__11-13
114__11-14
115__11-15
122__12-22
123__12-13
124__12-14
125__12-15
133__13-33
134__13-14
135__13-15
144__14-44
145__14-15
155__15-55
222__22
223__22-23
224__22-24
225__22-25
233__23-33
234__23-24
235__23-25
244__24-44
245__24-25
255__25-55
333__33
334__33-34
335__33-35
344__34-44
345__34-35
355__35-55
444__44
445__44-45
455__45-55
555__55

 January 24, 2005 [  Midday ] 7 4 1   431_code         
January 24, 2005 [ Evening ] 4 7 5       343_33 
January 25, 2005 [  Midday ] 1 1 3      112 11         
January 25, 2005 [ Evening ] 7 4 6       434 
January 26, 2005 [  Midday ] 8 5 7    534_34_35         
January 26, 2005 [ Evening ] 7 0 6      414 
January 27, 2005 [  Midday ] 6 2 4     423         
January 27, 2005 [ Evening ] 1 2 6     124 
January 28, 2005 [  Midday ] 6 9 6   454_44_45       
January 28, 2005 [ Evening ] 1 8 8     155 
January 29, 2005 [ Evening ] 8 5 2    532________Lot #
January 30, 2005 [  Midday ] 0 3 7   124                    7     
January 30, 2005 [ Evening ] 4 9 1    351 
January 31, 2005 [  Midday ] 1 8 6  154____15       
January 31, 2005 [ Evening ] 2 9 3      252_22 
Feb____ 01, 2005 [  Midday ] 1 4 3    132       
Feb____ 01, 2005 [ Evening ] 2 0 5    213____13  0
Feb____ 02, 2005 [  Midday ] 8 3 9  525____55  9   
Feb____ 02, 2005 [ Evening ] 4 6 3    342____24  43
Feb____ 03, 2005 [  Midday ] 2 6 1  241_12_14  61   
Feb____ 03, 2005 [ Evening ] 8 2 5   523_23_25  825