a-a a-c aaa aac aaf aak aar aas ac- aca acc acf ack acr acs af- afa afc aff afk afr afs aka akc akk akr aks ar- ara arc arf ark arr ars as- asa asc asf ask asr ass c-- caa cac caf cak car cas cca ccc ccf cck ccr ccs cfa cfc cff cfk cfr cfs cka ckc cks cra crc crf crk crr crs csa csc csf csk csr css faa fac faf fak far fas fca fcc fcf fck fcr fcs ffa ffc fff ffk ffr ffs fka fkc fkf fkk fra frc frf frk frr frs fsa fsc fsf fsk fsr fss ka- kaa kac kaf kak kar kas kca kcc kck kcr kcs kfa kfc kff kfs kkc kkk kkr kks kra krc krf krk krr krs ksa ksc ksf ksk ksr kss ra- raa rac raf rak rar ras rca rcc rcf rcr rcs rfa rfc rff rfk rfr rfs rkc rkf rkk rks rra rrc rrf rrk rrr rrs rsa rsc rsf rsk rsr rss saa sac saf sak sar sas sca scc scf sck scr scs sfa sfc sff sfk sfr sfs sk- ska skc skf skk skr sks sr- sra src srf srk srr srs ss- ssa ssc ssf ssk ssr sss