a-a a-b a-i aaa aab aad aai aan aap aar ab- aba abb abd abi abn abp abr ad- ada adb add adi adn adp adr ai- aia aib aid aii ain aip air an- ana anb and ani ann anp anr ap- apa apb apd api apn app apr ar- ara arb ard ari arn arp arr b-p baa bab bad bai ban bap bar bba bbb bbd bbi bbn bbp bbr bda bdb bdd bdi bdp bdr bi- bia bib bid bii bin bip bir bna bnb bnd bni bnn bnp bnr bpa bpb bpd bpi bpn bpp bpr bra brb brd bri brn brp brr daa dab dad dai dan dap dar dba dbb dbd dbi dbn dbp dbr dda ddb ddd ddi ddn ddp ddr di- dia dib did dii din dip dir dna dnb dnd dni dnn dnp dnr dpa dpb dpd dpi dpn dpp dpr dra drb drd dri drn drp drr i-d ia- iaa iab iad iai ian iap iar iba ibb ibd ibi ibn ibp ibr ida idb idd idi idn idp idr iia iib iid iii iin iip iir in- ina inb ind ini inn inp inr ipa ipb ipd ipi ipn ipp ipr ir- ira irb ird iri irn irp irr n-i naa nab nad nai nan nap nar nba nbb nbd nbi nbn nbp nbr nda ndb ndd ndi ndn ndp ndr nia nib nid nii nin nip nir nna nnb nni nnn nnp npa npb npd npi npn npp npr nra nrb nrd nri nrn nrp nrr p-p paa pab pad pai pan pap par pba pbb pbd pbi pbn pbp pbr pda pdb pdd pdi pdn pdp pdr pia pib pid pii pin pip pir pn- pna pnb pnd pni pnn pnp pnr ppa ppb ppd ppi ppn ppp ppr pra prb prd pri prn prp prr ra- raa rab rad rai ran rap rar rba rbb rbd rbi rbn rbp rbr rda rdb rdd rdi rdn rdp rdr ria rib rid rii rin rip rir rna rnb rnd rni rnn rnp rnr rpa rpb rpd rpi rpn rpp rpr rra rrb rrd rri rrn rrp rrr