a-a a-b a-i aaa aab aad aai aam aao aar ab- aba abb abd abi abm abo abr ad- ada adb add adi adm ado adr ai- aia aib aid aii aim aio air ama amb amd ami amm amo amr aoa aob aod aoi aom aoo aor ar- ara arb ard ari arm aro arr baa bab bad bai bam bao bar bba bbb bbd bbi bbm bbo bbr bda bdb bdd bdi bdm bdo bdr bi- bia bib bid bii bim bio bir bma bmb bmd bmi bmm bmo bmr boa bob bod boi bom boo bor bra brb brd bri brm bro brr daa dab dad dai dam dao dar dba dbb dbd dbi dbm dbo dbr dda ddb ddd ddi ddm ddo ddr di- dia dib did dii dim dio dir dma dmb dmd dmi dmm dmo dmr doa dob dod doi dom doo dor dra drb drd dri drm dro drr i-d ia- iaa iab iad iai iam iao iar iba ibb ibd ibi ibm ibo ibr ida idb idd idi idm ido idr iia iib iid iii iim iio iir im- ima imb imd imi imm imo io- ioa iob iod ioi iom ioo ior ir- ira irb ird iri irm iro irr m-o m-r maa mab mad mai mam mao mar mba mbb mbd mbi mbm mbo mbr mda mdb mdd mdi mdm mdo mdr mi- mia mib mid mii mim mio mir mma mmb mmd mmi mmm mmo mmr moa mob mod moi mom moo mor mra mrb mrd mri mrm mro mrr o-i oaa oab oad oai oam oao oar ob- oba obb obd obi obm obo obr oda odb odd odi odm odo odr oia oib oid oii oim oio oir om- oma omb omd omi omm omo omr oo- ooa oob ood ooi oom ooo oor or- ora orb ord ori orm oro orr ra- raa rab rad rai ram rao rar rba rbb rbd rbi rbm rbo rbr rda rdb rdd rdi rdm rdo rdr ria rib rid rii rim rio rir rma rmb rmd rmi rmm rmo rmr roa rob rod roi rom roo ror rra rrb rrd rri rrm rrr