a-a a-b aaa aab aad aam aan aas aau ab- aba abb abd abm abn abs abu ad- ada adb add adm adn ads adu ama amb amd amm amn ams amu an- ana anb and anm ann ans anu as- asa asb asd asm asn ass asu au- aua aub aud aum aun aus b-u baa bab bad bam ban bas bau bba bbb bbd bbm bbn bbs bbu bda bdb bdd bdm bds bdu bma bmb bmd bmm bmn bms bmu bna bnb bnd bnn bns bnu bsa bsb bsd bsm bsn bss bsu bua bub bud bum bun bus buu daa dab dad dam dan das dau dba dbb dbd dbm dbn dbs dbu dda ddb ddd ddm ddn dds ddu dma dmb dmd dmm dmn dms dmu dna dnb dnd dnm dnn dns dsa dsb dsd dsm dsn dss dsu dua dub dud dum dun dus maa mab mad mam man mas mau mba mbb mbd mbm mbs mbu mda mdb mdd mdm mdn mds mdu mma mmb mmd mmm mmn mms mmu mna mnb mnm mnn mns mnu msa msb msd msm msn mss msu mua mub mud mum mun mus muu naa nab nad nam nan nas nau nba nbb nbd nbm nbn nbs nbu nda ndb ndd ndm ndn nds ndu nma nmb nmd nmm nmn nms nmu nna nnb nnm nnn nns nnu nsa nsb nsd nsm nsn nss nsu nua nub nud num nun nus nuu saa sab sad sam san sas sau sba sbb sbd sbm sbn sbs sbu sda sdb sdd sdm sdn sds sdu sma smb smd smm smn sms smu sna snb snd snm snn sns snu ss- ssa ssb ssd ssm ssn sss ssu sua sub sud sum sun sus suu ua- uaa uab uad uam uan uas uau uba ubb ubn ubs ubu uda udb udd udm udn uds udu um- uma umb umd umm umn ums umu un- una unb und unm unn uns unu usa usb usd usm usn uss usu uua uum uun uus uuu