-ic a-a a-b a-c a-i aaa aab aac aah aai aan aao aap aar ab- aba abb abc abh abi abn abo abp abr ac- aca acb acc ach aci acn aco acp acr aha ahb ahc ahh ahi ahn aho ahp ahr ai- aia aib aic aih aii ain aio aip air an- ana anb anc anh ani ann ano anp anr aoa aob aoc aoh aoi aon aoo aop aor ap- apa apb apc aph api apn apo app apr ar- ara arb arc arh ari arn aro arp arr b-p baa bab bac bah bai ban bao bap bar bba bbb bbc bbh bbi bbn bbo bbp bbr bca bcb bcc bch bci bcn bco bcp bcr bha bhb bhc bhh bhi bho bhp bhr bi- bia bib bic bih bii bin bio bip bir bna bnb bnc bni bnn bno bnp bnr boa bob boc boh boi bon boo bop bor bpa bpb bpc bph bpi bpn bpo bpp bpr bra brb brh bri brn bro brp brr c-- caa cab cac cah cai can cao cap car cba cbb cbc cbh cbi cbn cbo cbp cbr cca ccb ccc cch cci ccn cco ccp ccr ch- cha chb chc chh chi chn cho chp chr ci- cia cib cic cih cii cin cio cip cir cn- cna cnb cnc cnh cni cnn cno cnp cnr co- coa cob coc coh coi con coo cop cor cpa cpb cpc cph cpi cpn cpo cpp cpr cra crb crc crh cri crn cro crp crr h-i haa hab hac hah hai han hao hap har hba hbb hbc hbh hbi hbn hbo hbp hbr hca hcb hcc hch hci hcn hco hcp hcr hha hhb hhc hhh hhi hhn hho hhp hhr hia hib hic hih hii hin hio hip hir hna hnb hnc hnh hnn hno hoa hob hoc hoh hoi hon hoo hop hor hpa hpb hpc hph hpi hpn hpo hpp hpr hr- hra hrb hrc hrh hri hrn hro hrp hrr ia- iaa iab iac iah iai ian iao iap iar iba ibb ibc ibh ibi ibn ibo ibp ibr ica icb icc ich ici icn ico icp icr iha ihb ihc ihh ihi ihn iho ihp ihr iia iib iic iih iii iin iio iip iir in- ina inb inc inh ini inn ino inp inr io- ioa iob ioc ioh ioi ion ioo iop ior ipa ipb ipc ipi ipn ipo ipp ipr ir- ira irb irc iri irn iro irp irr n-i naa nab nac nah nai nan nao nap nar nba nbb nbc nbi nbn nbo nbp nbr nca ncb ncc nch nci ncn nco ncp ncr nha nhb nhc nhh nhi nhn nhp nhr nia nib nic nih nii nin nio nip nir nna nnb nnc nnh nni nnn nno nnp no- noa nob noc noh noi non noo nop nor npa npb npc nph npi npn npo npp npr nra nrb nrc nri nrn nro nrp nrr o-i oaa oab oac oah oai oan oao oap oar ob- oba obb obc obh obi obn obo obp obr oc- oca ocb occ och oci ocn oco ocp ocr oha ohc ohh ohi ohn oho ohp ohr oia oib oic oii oin oio oip oir on- ona onb onc onh oni onn ono onp onr oo- ooa oob ooc ooh ooi oon ooo oop oor op- opa opb opc oph opi opn opo opp opr or- ora orb orc orh ori orn oro orp orr p-p paa pab pac pah pai pan pao pap par pba pbb pbc pbi pbn pbo pbp pbr pca pcb pcc pch pci pcn pco pcp pcr pha phb phc phi phn pho php phr pia pib pic pih pii pin pio pip pir pn- pna pnb pnc pnh pni pnn pno pnp pnr poa pob poc poh poi pon poo pop por ppa ppb ppc pph ppi ppn ppo ppp ppr pra prb prc prh pri prn pro prp prr ra- raa rab rac rah rai ran rao rap rar rba rbb rbc rbh rbi rbn rbo rbp rbr rca rcb rcc rch rci rcn rco rcp rcr rh- rha rhb rhc rhh rhi rhn rho rhp rhr ria rib ric rih rii rin rio rip rir rna rnb rnc rnh rni rnn rno rnp rnr roa rob roc roh roi ron roo rop ror rpa rpb rpc rph rpi rpn rpo rpp rpr rra rrb rrc rrh rri rrn rrp rrr