1-5 ABCAD6-10 ACBDB11-15 BAACC
16-20 BBAAC21-25 AACEF26-30 ABDFC31-35 BADBC36-40 ACADD41-45 BADDD46-50 FEBAC51-55 AACDA56-60 DBCBB61-65 BACDB