a-a a-c aaa aac aah aan aao aar aas ac- aca acc ach acn aco acr acs aha ahc ahh ahn aho ahr ahs an- ana anc anh ann ano anr ans aoa aoc aoh aon aoo aor aos ar- ara arc arh arn aro arr ars as- asa asc ash asn aso asr ass c-- caa cac cah can cao car cas cca ccc cch ccn cco ccr ccs ch- cha chc chh chn cho chr chs cn- cna cnc cnh cnn cno cnr cns co- coa coc coh con coo cor cos cra crc crh crn cro crr crs csa csc csh csn cso csr css haa hac hah han hao har has hca hcc hch hcn hco hcr hcs hha hhc hhh hhn hho hhr hhs hna hnc hnh hnn hno hns hoa hoc hoh hon hoo hor hos hr- hra hrc hrh hrn hro hrr hrs hsa hsc hsh hsn hsr hss naa nac nah nan nao nar nas nca ncc nch ncn nco ncr ncs nha nhc nhh nhn nhr nhs nna nnc nnh nnn nno nns no- noa noc noh non noo nor nos nra nrc nrn nro nrr nrs nsa nsc nsh nsn nso nsr nss oaa oac oah oan oao oar oas oc- oca occ och ocn oco ocr ocs oha ohc ohh ohn oho ohr ohs on- ona onc onh onn ono onr ons oo- ooa ooc ooh oon ooo oor oos or- ora orc orh orn oro orr ors os- osa osc osh osn oso osr oss ra- raa rac rah ran rao rar ras rca rcc rch rcn rco rcr rcs rh- rha rhc rhh rhn rho rhr rhs rna rnc rnh rnn rno rnr rns roa roc roh ron roo ror ros rra rrc rrh rrn rrr rrs rsa rsc rsh rsn rso rsr rss saa sac sah san sao sar sas sca scc sch scn sco scr scs sh- sha shc shh shn sho shr shs sna snc snn sno snr sns soa soc soh son soo sor sos sr- sra src srh srn sro srr srs ss- ssa ssc ssh ssn sso ssr sss