-ic a-a a-b a-c a-i aaa aab aac aae aah aai aap ab- aba abb abc abe abh abi abp ac- aca acb acc ace ach aci acp aea aeb aec aee aeh aei aep aha ahb ahc ahe ahh ahi ahp ai- aia aib aic aie aih aii aip ap- apa apb apc ape aph api app b-p baa bab bac bae bah bai bap bba bbb bbc bbe bbh bbi bbp bca bcb bcc bce bch bci bcp be- bea beb bec bee beh bei bep bha bhb bhc bhe bhh bhi bhp bi- bia bib bic bie bih bii bip bpa bpb bpc bpe bph bpi bpp c-- caa cab cac cae cah cai cap cba cbb cbc cbe cbh cbi cbp cca ccb ccc cce cch cci ccp ce- cea ceb cec cee ceh cei cep ch- cha chb chc che chh chi chp ci- cia cib cic cie cih cii cip cpa cpb cpc cpe cph cpi cpp eaa eab eac eae eah eai eap eba ebb ebc ebe ebh ebi ebp ec- eca ecb ecc ece ech eci eea eeb eec eee eep eha ehb ehc ehe ehh ehi ehp eia eib eic eie eii eip ep- epa epb epc epe eph epi epp h-i haa hab hac hae hah hai hap hba hbb hbc hbe hbh hbi hbp hca hcb hcc hce hch hci hcp he- hea heb hec hee heh hei hep hha hhb hhc hhe hhh hhi hhp hia hib hic hie hih hii hip hpa hpb hpc hpe hph hpi hpp ia- iaa iab iac iae iah iai iap iba ibb ibc ibe ibh ibi ibp ica icb icc ice ich ici icp ie- iea iec iee iei iep iha ihb ihc ihe ihh ihi ihp iia iib iic iie iih iii iip ipa ipb ipc ipe ipi ipp p-p paa pab pac pae pah pai pap pba pbb pbc pbe pbi pbp pca pcb pcc pce pch pci pcp pea peb pec pee peh pei pep pha phb phc phe phi php pia pib pic pie pih pii pip ppa ppb ppc ppe pph ppi ppp