-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aao aap aar ab- aba abb abc abe abh abi abo abp abr ac- aca acb acc ace ach aci aco acp acr aea aeb aec aee aeh aei aeo aep aer aha ahb ahc ahe ahh ahi aho ahp ahr ai- aia aib aic aie aih aii aio aip air aoa aob aoc aoe aoh aoi aoo aop aor ap- apa apb apc ape aph api apo app apr ar- ara arb arc are arh ari aro arp arr b-p baa bab bac bae bah bai bao bap bar bba bbb bbc bbe bbh bbi bbo bbp bbr bca bcb bcc bce bch bci bco bcp bcr be- bea beb bec bee beh bei beo bep ber bha bhb bhc bhe bhh bhi bho bhp bhr bi- bia bib bic bie bih bii bio bip bir boa bob boc boe boh boi boo bop bor bpa bpb bpc bpe bph bpi bpo bpp bpr bra brb bre brh bri bro brp brr c-- caa cab cac cae cah cai cao cap car cba cbb cbc cbe cbh cbi cbo cbp cbr cca ccb ccc cce cch cci cco ccp ccr ce- cea ceb cec cee ceh cei ceo cep cer ch- cha chb chc che chh chi cho chp chr ci- cia cib cic cie cih cii cio cip cir co- coa cob coc coe coh coi coo cop cor cpa cpb cpc cpe cph cpi cpo cpp cpr cra crb crc cre crh cri cro crp crr eaa eab eac eae eah eai eao eap ear eba ebb ebc ebe ebh ebi ebo ebp ebr ec- eca ecb ecc ece ech eci eco ecr eea eeb eec eee eeo eep eer eha ehb ehc ehe ehh ehi eho ehp ehr eia eib eic eie eii eio eip eir eo- eoa eob eoc eoe eoh eoi eoo eop eor ep- epa epb epc epe eph epi epo epp epr era erb erc ere erh eri ero erp err h-i haa hab hac hae hah hai hao hap har hba hbb hbc hbe hbh hbi hbo hbp hbr hca hcb hcc hce hch hci hco hcp hcr he- hea heb hec hee heh hei heo hep her hha hhb hhc hhe hhh hhi hho hhp hhr hia hib hic hie hih hii hio hip hir hoa hob hoc hoe hoh hoi hoo hop hor hpa hpb hpc hpe hph hpi hpo hpp hpr hr- hra hrb hrc hre hrh hri hro hrp hrr ia- iaa iab iac iae iah iai iao iap iar iba ibb ibc ibe ibh ibi ibo ibp ibr ica icb icc ice ich ici ico icp icr ie- iea iec iee iei iep ier iha ihb ihc ihe ihh ihi iho ihp ihr iia iib iic iie iih iii iio iip iir io- ioa iob ioc ioe ioh ioi ioo iop ior ipa ipb ipc ipe ipi ipo ipp ipr ir- ira irb irc ire iri iro irp irr o-i oaa oab oac oae oah oai oao oap oar ob- oba obb obc obe obh obi obo obp obr oc- oca ocb occ och oci oco ocp ocr oea oeb oec oee oeh oei oeo oep oer oha ohc ohe ohh ohi oho ohp ohr oia oib oic oie oii oio oip oir oo- ooa oob ooc ooh ooi ooo oop oor op- opa opb opc ope oph opi opo opp opr or- ora orb orc ore orh ori oro orp orr p-p paa pab pac pae pah pai pao pap par pba pbb pbc pbe pbi pbo pbp pbr pca pcb pcc pce pch pci pco pcp pcr pea peb pec pee peh pei peo pep per pha phb phc phe phi pho php phr pia pib pic pie pih pii pio pip pir poa pob poc poe poh poi poo pop por ppa ppb ppc ppe pph ppi ppo ppp ppr pra prb prc pre prh pri pro prp prr ra- raa rab rac rae rah rai rao rap rar rba rbb rbc rbe rbh rbi rbo rbp rbr rca rcb rcc rce rch rci rco rcp rcr re- rea reb rec ree reh rei reo rep rer rh- rha rhb rhc rhe rhh rhi rho rhp rhr ria rib ric rie rih rii rio rip rir roa rob roc roe roh roi roo rop ror rpa rpb rpc rpe rph rpi rpo rpp rpr rra rrb rrc rrh rri rrp rrr