-er a-a a-b a-i aaa aab aad aae aai aan aap aar ab- aba abb abd abe abi abn abp abr ad- ada adb add ade adi adn adp adr aea aeb aed aee aei aen aep aer ai- aia aib aid aie aii ain aip air an- ana anb and ane ani ann anp anr ap- apa apb apd ape api apn app apr ar- ara arb ard are ari arn arp arr b-p baa bab bad bae bai ban bap bar bba bbb bbd bbe bbi bbn bbp bbr bda bdb bdd bde bdi bdp bdr be- bea beb bed bee bei ben bep ber bi- bia bib bid bie bii bin bip bir bna bnb bnd bne bni bnn bnp bnr bpa bpb bpd bpe bpi bpn bpp bpr bra brb brd bre bri brn brp brr daa dab dad dae dai dan dap dar dba dbb dbd dbe dbi dbn dbp dbr dda ddb ddd dde ddi ddn ddp ddr de- dea deb ded dee dei den dep der di- dia dib did die dii din dip dir dna dnb dnd dne dni dnn dnp dnr dpa dpb dpd dpe dpi dpn dpp dpr dra drb drd dre dri drn drp drr eaa eab ead eae eai ean eap ear eba ebb ebd ebe ebi ebn ebp ebr ed- eda edb edd ede edi edn edp edr eea eeb eed eee een eep eer eia eib eid eie eii ein eip eir en- ena enb end ene eni enn enp enr ep- epa epb epd epe epi epn epp epr era erb erd ere eri ern erp err i-d ia- iaa iab iad iae iai ian iap iar iba ibb ibd ibe ibi ibn ibp ibr ida idb idd ide idi idn idp idr ie- iea ied iee iei ien iep ier iia iib iid iie iii iin iip iir in- ina inb ind ine ini inn inp inr ipa ipb ipd ipe ipi ipn ipp ipr ir- ira irb ird ire iri irn irp irr n-i naa nab nad nae nai nan nap nar nba nbb nbd nbe nbi nbn nbp nbr nda ndb ndd nde ndi ndn ndp ndr ne- nea neb ned nee nei nen nep ner nia nib nid nie nii nin nip nir nna nnb nne nni nnn nnp npa npb npd npe npi npn npp npr nra nrb nrd nre nri nrn nrp nrr p-p paa pab pad pae pai pan pap par pba pbb pbd pbe pbi pbn pbp pbr pda pdb pdd pde pdi pdn pdp pdr pea peb ped pee pei pen pep per pia pib pid pie pii pin pip pir pn- pna pnb pnd pne pni pnn pnp pnr ppa ppb ppd ppe ppi ppn ppp ppr pra prb prd pre pri prn prp prr ra- raa rab rad rae rai ran rap rar rba rbb rbd rbe rbi rbn rbp rbr rda rdb rdd rde rdi rdn rdp rdr re- rea reb red ree rei ren rep rer ria rib rid rie rii rin rip rir rna rnb rnd rni rnn rnp rnr rpa rpb rpd rpe rpi rpn rpp rpr rra rrb rrd rri rrn rrp rrr