Algo : 
1 -> ABC
2 -> B
3 -> B
4 -> C
5 -> ABCD
6 -> B
7 -> CD
8 -> C
9 -> B
10 -> BD

Maths :
11 -> ABCD
12 -> BD
13 -> ABCD
14 -> A
15 -> AB
16 -> AB
17 -> C
18 -> A
19 -> C
20 -> C

Anglais :
21 -> A
22 -> B
23 -> C
24 -> A
25 -> A
26 -> C
27 -> B
28 -> A
29 -> D
30 -> D

OC :
31 -> A
32 -> D
33 -> C
34 -> A
35 -> B
36 -> C
37 -> C
38 -> B
39 -> C
40 -> A

Physique :
41 -> B
42 -> A
43 -> C
44 -> C
45 -> B
46 -> C
47 -> C
48 -> A
49 -> C
50 -> A

Electronique :
1 -> D
2 -> B
3 -> A
4 -> D
5 -> C
6 -> B
7 -> D
8 -> D
9 -> B
10 -> A

Architecture :
11 -> D
12 -> BC
13 -> A
14 -> B
15 -> C
16 -> B
17 -> C
18 -> D
19 -> A
20 -> D