-ic a-a a-b a-c a-i aaa aab aac aae aah aai aao aap ab- aba abb abc abe abh abi abo abp ac- aca acb acc ace ach aci aco acp aea aeb aec aee aeh aei aeo aep aha ahb ahc ahe ahh ahi aho ahp ai- aia aib aic aie aih aii aio aip aoa aob aoc aoe aoh aoi aoo aop ap- apa apb apc ape aph api apo app b-p baa bab bac bae bah bai bao bap bba bbb bbc bbe bbh bbi bbo bbp bca bcb bcc bce bch bci bco bcp be- bea beb bec bee beh bei beo bep bha bhb bhc bhe bhh bhi bho bhp bi- bia bib bic bie bih bii bio bip boa bob boc boe boh boi boo bop bpa bpb bpc bpe bph bpi bpo bpp c-- caa cab cac cae cah cai cao cap cba cbb cbc cbe cbh cbi cbo cbp cca ccb ccc cce cch cci cco ccp ce- cea ceb cec cee ceh cei ceo cep ch- cha chb chc che chh chi cho chp ci- cia cib cic cie cih cii cio cip co- coa cob coc coe coh coi coo cop cpa cpb cpc cpe cph cpi cpo cpp eaa eab eac eae eah eai eao eap eba ebb ebc ebe ebh ebi ebo ebp ec- eca ecb ecc ece ech eci eco eea eeb eec eee eeo eep eha ehb ehc ehe ehh ehi eho ehp eia eib eic eie eii eio eip eo- eoa eob eoc eoe eoh eoi eoo eop ep- epa epb epc epe eph epi epo epp h-i haa hab hac hae hah hai hao hap hba hbb hbc hbe hbh hbi hbo hbp hca hcb hcc hce hch hci hco hcp he- hea heb hec hee heh hei heo hep hha hhb hhc hhe hhh hhi hho hhp hia hib hic hie hih hii hio hip hoa hob hoc hoe hoh hoi hoo hop hpa hpb hpc hpe hph hpi hpo hpp ia- iaa iab iac iae iah iai iao iap iba ibb ibc ibe ibh ibi ibo ibp ica icb icc ice ich ici ico icp ie- iea iec iee iei iep iha ihb ihc ihe ihh ihi iho ihp iia iib iic iie iih iii iio iip io- ioa iob ioc ioe ioh ioi ioo iop ipa ipb ipc ipe ipi ipo ipp o-i oaa oab oac oae oah oai oao oap ob- oba obb obc obe obh obi obo obp oc- oca ocb occ och oci oco ocp oea oeb oec oee oeh oei oeo oep oha ohc ohe ohh ohi oho ohp oia oib oic oie oii oio oip oo- ooa oob ooc ooh ooi ooo oop op- opa opb opc ope oph opi opo opp p-p paa pab pac pae pah pai pao pap pba pbb pbc pbe pbi pbo pbp pca pcb pcc pce pch pci pco pcp pea peb pec pee peh pei peo pep pha phb phc phe phi pho php pia pib pic pie pih pii pio pip poa pob poc poe poh poi poo pop ppa ppb ppc ppe pph ppi ppo ppp