a-a a-c aaa aac aaf aaj aak aao aar ac- aca acc acf acj ack aco acr af- afa afc aff afj afk afo afr aja ajc ajf ajj ajk ajo ajr aka akc akj akk ako akr aoa aoc aof aoj aok aoo aor ar- ara arc arf arj ark aro arr c-- c-j caa cac caf caj cak cao car cca ccc ccf ccj cck cco ccr cfa cfc cff cfk cfo cfr cja cjc cjf cjk cjr cka ckc cko co- coa coc cof coj cok coo cor cra crc crf crj crk cro crr faa fac faf faj fak fao far fca fcc fcf fcj fck fco fcr ffa ffc fff ffk ffo ffr fja fjc fka fkc fkf fkj fkk foa foc fof fok foo for fra frc frf frj frk fro frr jaa jac jaf jaj jak jao jar jca jcc jcf jck jco jcr jfa jfc jff jfj jfk jfo jfr jja jjc jjf jjj jjk jjr jka jkk jko jkr joa joc jof joj jok joo jor jra jrc jrf jrk jro jrr ka- kaa kac kaf kaj kak kao kar kca kcc kck kcr kfa kfc kff kfo kjc kjr kkc kkk kkr koa koc kof kok koo kor kra krc krf krk kro krr oaa oac oaf oaj oak oao oar oc- oca occ ocf ocj ock oco ocr of- ofa ofc off ofo ofr oja ojc ojo oka okc okj okk oko okr oo- ooa ooc oof ook ooo oor or- ora orc orf ork oro orr ra- raa rac raf raj rak rao rar rca rcc rcf rcj rco rcr rfa rfc rff rfj rfk rfo rfr rja rjc rjf rjk rjr rkc rkf rkk rko roa roc rof roj rok roo ror rra rrc rrf rrk rrr