6-10 AACBD
11-15 CADAA
16-20 ACCAA
21-25 BBABC
26-30 DCDEF
31-35 BBCDD
36-40 CACDD
41-45 CBABD
46-50 AFEBD
51-55 ADDCC
56-60 BBCAC
61-65 DBADC