a-a a-b aaa aab aad aam aao aar aav ab- aba abb abd abm abo abr abv ad- ada adb add adm ado adr adv ama amb amd amm amo amr amv aoa aob aod aom aoo aor aov ar- ara arb ard arm aro arr arv av- ava avb avd avm avo avr baa bab bad bam bao bar bav bba bbb bbd bbm bbo bbr bda bdb bdd bdm bdo bdr bdv bma bmb bmd bmm bmo bmr bmv boa bob bod bom boo bor bov bra brb brd brm bro brr brv bva bvb bvd bvm bvo bvr bvv daa dab dad dam dao dar dav dba dbb dbd dbm dbo dbr dbv dda ddb ddd ddm ddo ddr dma dmb dmd dmm dmo dmr dmv doa dob dod dom doo dor dov dra drb drd drm dro drr drv dva dvb dvd dvm dvr m-o m-r m-v maa mab mad mam mao mar mav mba mbb mbd mbm mbo mbr mbv mda mdb mdd mdm mdo mdr mdv mma mmb mmd mmm mmo mmr mmv moa mob mod mom moo mor mov mra mrb mrd mrm mro mrr mrv mva mvb mvd mvm mvo mvr mvv oaa oab oad oam oao oar oav ob- oba obb obd obm obo obr obv oda odb odd odm odo odr odv om- oma omb omd omm omo omr omv oo- ooa oob ood oom ooo oor oov or- ora orb ord orm oro orr orv ov- ova ovb ovd ovo ovv ra- raa rab rad ram rao rar rav rba rbb rbd rbm rbo rbr rda rdb rdd rdm rdo rdr rdv rma rmb rmd rmm rmo rmr rmv roa rob rod rom roo ror rov rra rrb rrd rrm rrr rva rvb rvd rvm rvo rvr rvv v-a vaa vab vad vam vao var vav vba vbd vbm vbo vbr vbv vdb vdd vdm vdo vdr vdv vm- vma vmd vmm vmo vmr voa vob vod vom voo vor vov vra vrb vrd vrm vrr vva vvb vvm vvo vvr vvv