-er b-p bbb bbe bbh bbi bbp bbr be- beb bee beh bei bep ber bhb bhe bhh bhi bhp bhr bi- bib bie bih bii bip bir bpb bpe bph bpi bpp bpr brb bre brh bri brp brr ebb ebe ebh ebi ebp ebr eeb eee eep eer ehb ehe ehh ehi ehp ehr eib eie eii eip eir ep- epb epe eph epi epp epr erb ere erh eri erp err h-i hbb hbe hbh hbi hbp hbr he- heb hee heh hei hep her hhb hhe hhh hhi hhp hhr hib hie hih hii hip hir hpb hpe hph hpi hpp hpr hr- hrb hre hrh hri hrp hrr ibb ibe ibh ibi ibp ibr ie- iee iei iep ier ihb ihe ihh ihi ihp ihr iib iie iih iii iip iir ipb ipe ipi ipp ipr ir- irb ire iri irp irr p-p pbb pbe pbi pbp pbr peb pee peh pei pep per phb phe phi php phr pib pie pih pii pip pir ppb ppe pph ppi ppp ppr prb pre prh pri prp prr rbb rbe rbh rbi rbp rbr re- reb ree reh rei rep rer rh- rhb rhe rhh rhi rhp rhr rib rie rih rii rip rir rpb rpe rph rpi rpp rpr rrb rrh rri rrp rrr