-er -ic a-a a-b a-c a-i aaa aab aac aae aah aai aap aar ab- aba abb abc abe abh abi abp abr ac- aca acb acc ace ach aci acp acr aea aeb aec aee aeh aei aep aer aha ahb ahc ahe ahh ahi ahp ahr ai- aia aib aic aie aih aii aip air ap- apa apb apc ape aph api app apr ar- ara arb arc are arh ari arp arr b-p baa bab bac bae bah bai bap bar bba bbb bbc bbe bbh bbi bbp bbr bca bcb bcc bce bch bci bcp bcr be- bea beb bec bee beh bei bep ber bha bhb bhc bhe bhh bhi bhp bhr bi- bia bib bic bie bih bii bip bir bpa bpb bpc bpe bph bpi bpp bpr bra brb bre brh bri brp brr c-- caa cab cac cae cah cai cap car cba cbb cbc cbe cbh cbi cbp cbr cca ccb ccc cce cch cci ccp ccr ce- cea ceb cec cee ceh cei cep cer ch- cha chb chc che chh chi chp chr ci- cia cib cic cie cih cii cip cir cpa cpb cpc cpe cph cpi cpp cpr cra crb crc cre crh cri crp crr eaa eab eac eae eah eai eap ear eba ebb ebc ebe ebh ebi ebp ebr ec- eca ecb ecc ece ech eci ecr eea eeb eec eee eep eer eha ehb ehc ehe ehh ehi ehp ehr eia eib eic eie eii eip eir ep- epa epb epc epe eph epi epp epr era erb erc ere erh eri erp err h-i haa hab hac hae hah hai hap har hba hbb hbc hbe hbh hbi hbp hbr hca hcb hcc hce hch hci hcp hcr he- hea heb hec hee heh hei hep her hha hhb hhc hhe hhh hhi hhp hhr hia hib hic hie hih hii hip hir hpa hpb hpc hpe hph hpi hpp hpr hr- hra hrb hrc hre hrh hri hrp hrr ia- iaa iab iac iae iah iai iap iar iba ibb ibc ibe ibh ibi ibp ibr ica icb icc ice ich ici icp icr ie- iea iec iee iei iep ier iha ihb ihc ihe ihh ihi ihp ihr iia iib iic iie iih iii iip iir ipa ipb ipc ipe ipi ipp ipr ir- ira irb irc ire iri irp irr p-p paa pab pac pae pah pai pap par pba pbb pbc pbe pbi pbp pbr pca pcb pcc pce pch pci pcp pcr pea peb pec pee peh pei pep per pha phb phc phe phi php phr pia pib pic pie pih pii pip pir ppa ppb ppc ppe pph ppi ppp ppr pra prb prc pre prh pri prp prr ra- raa rab rac rae rah rai rap rar rba rbb rbc rbe rbh rbi rbp rbr rca rcb rcc rce rch rci rcp rcr re- rea reb rec ree reh rei rep rer rh- rha rhb rhc rhe rhh rhi rhp rhr ria rib ric rie rih rii rip rir rpa rpb rpc rpe rph rpi rpp rpr rra rrb rrc rrh rri rrp rrr