a-a a-c aaa aac aaf aah aan aao aar ac- aca acc acf ach acn aco acr af- afa afc aff afh afn afo afr aha ahc ahf ahh ahn aho ahr an- ana anc anf anh ann ano anr aoa aoc aof aoh aon aoo aor ar- ara arc arf arh arn aro arr c-- caa cac caf cah can cao car cca ccc ccf cch ccn cco ccr cfa cfc cff cfh cfn cfo cfr ch- cha chc chf chh chn cho chr cn- cna cnc cnf cnh cnn cno cnr co- coa coc cof coh con coo cor cra crc crf crh crn cro crr faa fac faf fah fan fao far fca fcc fcf fcn fco fcr ffa ffc fff ffh ffn ffo ffr fha fhc fhf fhh fhn fho fhr fna fnc fnf fnh fnn fnr foa foc fof foh fon foo for fra frc frf frh frn fro frr haa hac haf hah han hao har hca hcc hcf hch hcn hco hcr hfa hfc hff hfh hfn hfo hfr hha hhc hhf hhh hhn hho hhr hna hnc hnf hnh hnn hno hoa hoc hof hoh hon hoo hor hr- hra hrc hrf hrh hrn hro hrr naa nac naf nah nan nao nar nca ncc ncf nch ncn nco ncr nfa nfc nff nfn nfo nfr nha nhc nhf nhh nhn nhr nna nnc nnf nnh nnn nno no- noa noc nof noh non noo nor nra nrc nrf nrn nro nrr oaa oac oaf oah oan oao oar oc- oca occ ocf och ocn oco ocr of- ofa ofc off ofn ofo ofr oha ohc ohf ohh ohn oho ohr on- ona onc onf onh onn ono onr oo- ooa ooc oof ooh oon ooo oor or- ora orc orf orh orn oro orr ra- raa rac raf rah ran rao rar rca rcc rcf rch rcn rco rcr rfa rfc rff rfh rfn rfo rfr rh- rha rhc rhf rhh rhn rho rhr rna rnc rnh rnn rno rnr roa roc rof roh ron roo ror rra rrc rrf rrh rrn rrr