-ic a-a a-b a-c a-i aaa aab aac aah aai aao aap aar aas ab- aba abb abc abh abi abo abp abr abs ac- aca acb acc ach aci aco acp acr acs aha ahb ahc ahh ahi aho ahp ahr ahs ai- aia aib aic aih aii aio aip air ais aoa aob aoc aoh aoi aoo aop aor aos ap- apa apb apc aph api apo app apr aps ar- ara arb arc arh ari aro arp arr ars as- asa asb asc ash asi aso asp asr ass b-p baa bab bac bah bai bao bap bar bas bba bbb bbc bbh bbi bbo bbp bbr bbs bca bcb bcc bch bci bco bcp bcr bcs bha bhb bhc bhh bhi bho bhp bhr bhs bi- bia bib bic bih bii bio bip bir bis boa bob boc boh boi boo bop bor bos bpa bpb bpc bph bpi bpo bpp bpr bps bra brb brh bri bro brp brr brs bsa bsb bsc bsh bsi bso bsp bsr bss c-- caa cab cac cah cai cao cap car cas cba cbb cbc cbh cbi cbo cbp cbr cbs cca ccb ccc cch cci cco ccp ccr ccs ch- cha chb chc chh chi cho chp chr chs ci- cia cib cic cih cii cio cip cir cis co- coa cob coc coh coi coo cop cor cos cpa cpb cpc cph cpi cpo cpp cpr cps cra crb crc crh cri cro crp crr crs csa csb csc csh csi cso csp csr css h-i haa hab hac hah hai hao hap har has hba hbb hbc hbh hbi hbo hbp hbr hbs hca hcb hcc hch hci hco hcp hcr hcs hha hhb hhc hhh hhi hho hhp hhr hhs hia hib hic hih hii hio hip hir his hoa hob hoc hoh hoi hoo hop hor hos hpa hpb hpc hph hpi hpo hpp hpr hps hr- hra hrb hrc hrh hri hro hrp hrr hrs hsa hsb hsc hsh hsi hsp hsr hss ia- iaa iab iac iah iai iao iap iar ias iba ibb ibc ibh ibi ibo ibp ibr ibs ica icb icc ich ici ico icp icr ics iha ihb ihc ihh ihi iho ihp ihr ihs iia iib iic iih iii iio iip iir iis io- ioa iob ioc ioh ioi ioo iop ior ios ipa ipb ipc ipi ipo ipp ipr ips ir- ira irb irc iri iro irp irr irs is- isa isb isc ish isi iso isp isr iss o-i oaa oab oac oah oai oao oap oar oas ob- oba obb obc obh obi obo obp obr obs oc- oca ocb occ och oci oco ocp ocr ocs oha ohc ohh ohi oho ohp ohr ohs oia oib oic oii oio oip oir ois oo- ooa oob ooc ooh ooi ooo oop oor oos op- opa opb opc oph opi opo opp opr ops or- ora orb orc orh ori oro orp orr ors os- osa osb osc osh osi oso osp osr oss p-p paa pab pac pah pai pao pap par pas pba pbb pbc pbi pbo pbp pbr pbs pca pcb pcc pch pci pco pcp pcr pcs pha phb phc phi pho php phr phs pia pib pic pih pii pio pip pir pis poa pob poc poh poi poo pop por pos ppa ppb ppc pph ppi ppo ppp ppr pps pra prb prc prh pri pro prp prr prs ps- psa psb psc psh psi pso psp psr pss ra- raa rab rac rah rai rao rap rar ras rba rbb rbc rbh rbi rbo rbp rbr rbs rca rcb rcc rch rci rco rcp rcr rcs rh- rha rhb rhc rhh rhi rho rhp rhr rhs ria rib ric rih rii rio rip rir ris roa rob roc roh roi roo rop ror ros rpa rpb rpc rph rpi rpo rpp rpr rps rra rrb rrc rrh rri rrp rrr rrs rsa rsb rsc rsh rsi rso rsp rsr rss saa sab sac sah sai sao sap sar sas sba sbb sbc sbh sbi sbo sbp sbr sbs sca scb scc sch sci sco scp scr scs sh- sha shb shc shh shi sho shp shr shs sia sib sic sih sii sio sip sir sis soa sob soc soh soi soo sop sor sos spa spb spc sph spi spo spp spr sps sr- sra srb src srh sri sro srp srr srs ss- ssa ssb ssc ssh ssi sso ssp ssr sss