-ic a-a a-b a-c a-i aaa aab aac aah aai aao aap aar ab- aba abb abc abh abi abo abp abr ac- aca acb acc ach aci aco acp acr aha ahb ahc ahh ahi aho ahp ahr ai- aia aib aic aih aii aio aip air aoa aob aoc aoh aoi aoo aop aor ap- apa apb apc aph api apo app apr ar- ara arb arc arh ari aro arp arr b-p baa bab bac bah bai bao bap bar bba bbb bbc bbh bbi bbo bbp bbr bca bcb bcc bch bci bco bcp bcr bha bhb bhc bhh bhi bho bhp bhr bi- bia bib bic bih bii bio bip bir boa bob boc boh boi boo bop bor bpa bpb bpc bph bpi bpo bpp bpr bra brb brh bri bro brp brr c-- caa cab cac cah cai cao cap car cba cbb cbc cbh cbi cbo cbp cbr cca ccb ccc cch cci cco ccp ccr ch- cha chb chc chh chi cho chp chr ci- cia cib cic cih cii cio cip cir co- coa cob coc coh coi coo cop cor cpa cpb cpc cph cpi cpo cpp cpr cra crb crc crh cri cro crp crr h-i haa hab hac hah hai hao hap har hba hbb hbc hbh hbi hbo hbp hbr hca hcb hcc hch hci hco hcp hcr hha hhb hhc hhh hhi hho hhp hhr hia hib hic hih hii hio hip hir hoa hob hoc hoh hoi hoo hop hor hpa hpb hpc hph hpi hpo hpp hpr hr- hra hrb hrc hrh hri hro hrp hrr ia- iaa iab iac iah iai iao iap iar iba ibb ibc ibh ibi ibo ibp ibr ica icb icc ich ici ico icp icr iha ihb ihc ihh ihi iho ihp ihr iia iib iic iih iii iio iip iir io- ioa iob ioc ioh ioi ioo iop ior ipa ipb ipc ipi ipo ipp ipr ir- ira irb irc iri iro irp irr o-i oaa oab oac oah oai oao oap oar ob- oba obb obc obh obi obo obp obr oc- oca ocb occ och oci oco ocp ocr oha ohc ohh ohi oho ohp ohr oia oib oic oii oio oip oir oo- ooa oob ooc ooh ooi ooo oop oor op- opa opb opc oph opi opo opp opr or- ora orb orc orh ori oro orp orr p-p paa pab pac pah pai pao pap par pba pbb pbc pbi pbo pbp pbr pca pcb pcc pch pci pco pcp pcr pha phb phc phi pho php phr pia pib pic pih pii pio pip pir poa pob poc poh poi poo pop por ppa ppb ppc pph ppi ppo ppp ppr pra prb prc prh pri pro prp prr ra- raa rab rac rah rai rao rap rar rba rbb rbc rbh rbi rbo rbp rbr rca rcb rcc rch rci rco rcp rcr rh- rha rhb rhc rhh rhi rho rhp rhr ria rib ric rih rii rio rip rir roa rob roc roh roi roo rop ror rpa rpb rpc rph rpi rpo rpp rpr rra rrb rrc rrh rri rrp rrr