numbers material
1       14        A
2       18        A
3       19        A
4       17        A
5       16        A
6       18        A
7        7        B
8        8        B
9       15        B
10      11        B
11       9        B
12      10        B
13      19        C
14      25        C
15      22        C
16      23        C
17      18        C
18      20        C
19      12        D
20      17        D
21      13        D
22      18        D
23      19        D
24      15        D