-ic a-a a-b a-c a-i aaa aab aac aae aah aai aan aap ab- aba abb abc abe abh abi abn abp ac- aca acb acc ace ach aci acn acp aea aeb aec aee aeh aei aen aep aha ahb ahc ahe ahh ahi ahn ahp ai- aia aib aic aie aih aii ain aip an- ana anb anc ane anh ani ann anp ap- apa apb apc ape aph api apn app b-p baa bab bac bae bah bai ban bap bba bbb bbc bbe bbh bbi bbn bbp bca bcb bcc bce bch bci bcn bcp be- bea beb bec bee beh bei ben bep bha bhb bhc bhe bhh bhi bhp bi- bia bib bic bie bih bii bin bip bna bnb bnc bne bni bnn bnp bpa bpb bpc bpe bph bpi bpn bpp c-- caa cab cac cae cah cai can cap cba cbb cbc cbe cbh cbi cbn cbp cca ccb ccc cce cch cci ccn ccp ce- cea ceb cec cee ceh cei cen cep ch- cha chb chc che chh chi chn chp ci- cia cib cic cie cih cii cin cip cn- cna cnb cnc cne cnh cni cnn cnp cpa cpb cpc cpe cph cpi cpn cpp eaa eab eac eae eah eai ean eap eba ebb ebc ebe ebh ebi ebn ebp ec- eca ecb ecc ece ech eci ecn eea eeb eec eee een eep eha ehb ehc ehe ehh ehi ehn ehp eia eib eic eie eii ein eip en- ena enb enc ene enh eni enn enp ep- epa epb epc epe eph epi epn epp h-i haa hab hac hae hah hai han hap hba hbb hbc hbe hbh hbi hbn hbp hca hcb hcc hce hch hci hcn hcp he- hea heb hec hee heh hei hen hep hha hhb hhc hhe hhh hhi hhn hhp hia hib hic hie hih hii hin hip hna hnb hnc hne hnh hnn hpa hpb hpc hpe hph hpi hpn hpp ia- iaa iab iac iae iah iai ian iap iba ibb ibc ibe ibh ibi ibn ibp ica icb icc ice ich ici icn icp ie- iea iec iee iei ien iep iha ihb ihc ihe ihh ihi ihn ihp iia iib iic iie iih iii iin iip in- ina inb inc ine inh ini inn inp ipa ipb ipc ipe ipi ipn ipp n-i naa nab nac nae nah nai nan nap nba nbb nbc nbe nbi nbn nbp nca ncb ncc nce nch nci ncn ncp ne- nea neb nec nee neh nei nen nep nha nhb nhc nhe nhh nhi nhn nhp nia nib nic nie nih nii nin nip nna nnb nnc nne nnh nni nnn nnp npa npb npc npe nph npi npn npp p-p paa pab pac pae pah pai pan pap pba pbb pbc pbe pbi pbn pbp pca pcb pcc pce pch pci pcn pcp pea peb pec pee peh pei pen pep pha phb phc phe phi phn php pia pib pic pie pih pii pin pip pn- pna pnb pnc pne pnh pni pnn pnp ppa ppb ppc ppe pph ppi ppn ppp