a-a a-b a-t aaa aab aam aan aao aas aat aau ab- aba abb abm abn abo abs abt abu ama amb amm amn amo ams amt amu an- ana anb anm ann ano ans ant anu aoa aob aom aon aoo aos aot aou as- asa asb asm asn aso ass ast asu at- ata atb atm atn ato ats att atu au- aua aub aum aun auo aus aut b-u baa bab bam ban bao bas bat bau bba bbb bbm bbn bbo bbs bbt bbu bma bmb bmm bmn bmo bms bmt bmu bna bnb bnn bno bns bnt bnu boa bob bom bon boo bos bot bou bsa bsb bsm bsn bso bss bst bsu bta btb btm btn bto bts btt btu bua bub bum bun buo bus but buu m-o maa mab mam man mao mas mat mau mba mbb mbm mbo mbs mbt mbu mma mmb mmm mmn mmo mms mmt mmu mna mnb mnm mnn mno mns mnt mnu moa mob mom mon moo mos mot mou msa msb msm msn mso mss mst msu mta mtb mtm mtn mto mts mtt mtu mua mub mum mun mus mut muu naa nab nam nan nao nas nat nau nba nbb nbm nbn nbo nbs nbt nbu nma nmb nmm nmn nmo nms nmt nmu nna nnb nnm nnn nno nns nnt nnu no- noa nob nom non noo nos not nou nsa nsb nsm nsn nso nss nst nsu nta ntb ntm ntn nto nts ntt ntu nua nub num nun nuo nus nut nuu oaa oab oam oan oao oas oat oau ob- oba obb obm obn obo obs obt obu om- oma omb omm omn omo oms omt omu on- ona onb onn ono ons ont onu oo- ooa oob oom oon ooo oos oot os- osa osb osm osn oso oss ost osu ot- ota otb otm otn oto ots ott otu ou- oua oum oun ouo ous out saa sab sam san sao sas sat sau sba sbb sbm sbn sbo sbs sbt sbu sma smb smm smn smo sms smt smu sna snb snm snn sno sns snt snu soa sob som son soo sos sot sou ss- ssa ssb ssm ssn sso sss sst ssu sta stb stm stn sto sts stt stu sua sub sum sun suo sus sut suu taa tab tam tan tao tas tat tau tba tbb tbm tbn tbo tbs tbt tbu tma tmb tmm tmn tmo tms tmt tmu tna tnb tnm tnn tno tns tnt to- toa tob tom ton too tos tot tou tsa tsb tsm tsn tso tss tst tsu tta ttb ttm ttn tto tts ttt ttu tua tub tum tun tuo tus tut tuu ua- uaa uab uam uan uao uas uat uau uba ubb ubn ubo ubs ubt ubu um- uma umb umm umn umo ums umt umu un- una unb unm unn uno uns unt unu uoa uob uom uon uoo uos uot usa usb usm usn uso uss ust usu uta utb utm utn uto uts utt utu uua uum uun uus uut uuu