a-a a-b a-c a-t aaa aab aac aad aan aao aas aat aau ab- aba abb abc abd abn abo abs abt abu ac- aca acb acc acd acn aco acs act acu ad- ada adb adc add adn ado ads adt adu an- ana anb anc and ann ano ans ant anu aoa aob aoc aod aon aoo aos aot aou as- asa asb asc asd asn aso ass ast asu at- ata atb atc atd atn ato ats att atu au- aua aub auc aud aun auo aus aut b-u baa bab bac bad ban bao bas bat bau bba bbb bbc bbd bbn bbo bbs bbt bbu bca bcb bcc bcd bcn bco bcs bct bcu bda bdb bdc bdd bdo bds bdt bdu bna bnb bnc bnd bnn bno bns bnt bnu boa bob boc bod bon boo bos bot bou bsa bsb bsc bsd bsn bso bss bst bsu bta btb btc btd btn bto bts btt btu bua bub buc bud bun buo bus but buu c-- caa cab cac cad can cao cas cat cau cba cbb cbc cbd cbn cbo cbs cbt cbu cca ccb ccc ccd ccn cco ccs cct ccu cda cdb cdc cdd cdn cdo cds cdt cdu cn- cna cnb cnc cnd cnn cno cns cnt cnu co- coa cob coc cod con coo cos cot cou csa csb csc csd csn cso css cst csu cta ctb ctc ctd ctn cto cts ctt ctu cua cub cuc cud cun cuo cus cut cuu daa dab dac dad dan dao das dat dau dba dbb dbc dbd dbn dbo dbs dbt dbu dca dcb dcc dcd dcn dco dcs dct dcu dda ddb ddc ddd ddn ddo dds ddt ddu dna dnb dnc dnd dnn dno dns dnt doa dob doc dod don doo dos dot dou dsa dsb dsc dsd dsn dso dss dst dsu dta dtb dtc dtd dtn dto dts dtt dtu dua dub duc dud dun duo dus dut naa nab nac nad nan nao nas nat nau nba nbb nbc nbd nbn nbo nbs nbt nbu nca ncb ncc ncd ncn nco ncs nct ncu nda ndb ndc ndd ndn ndo nds ndt ndu nna nnb nnc nnn nno nns nnt nnu no- noa nob noc nod non noo nos not nou nsa nsb nsc nsd nsn nso nss nst nsu nta ntb ntc ntd ntn nto nts ntt ntu nua nub nuc nud nun nuo nus nut nuu oaa oab oac oad oan oao oas oat oau ob- oba obb obc obd obn obo obs obt obu oc- oca ocb occ ocd ocn oco ocs oct ocu oda odb odc odd odn odo ods odt odu on- ona onb onc ond onn ono ons ont onu oo- ooa oob ooc ood oon ooo oos oot os- osa osb osc osd osn oso oss ost osu ot- ota otb otc otd otn oto ots ott otu ou- oua ouc oud oun ouo ous out saa sab sac sad san sao sas sat sau sba sbb sbc sbd sbn sbo sbs sbt sbu sca scb scc scd scn sco scs sct scu sda sdb sdc sdd sdn sdo sds sdt sdu sna snb snc snd snn sno sns snt snu soa sob soc sod son soo sos sot sou ss- ssa ssb ssc ssd ssn sso sss sst ssu sta stb stc std stn sto sts stt stu sua sub suc sud sun suo sus sut suu taa tab tac tad tan tao tas tat tau tba tbb tbc tbd tbn tbo tbs tbt tbu tca tcb tcc tcd tcn tco tcs tct tcu tda tdb tdc tdd tdn tdo tds tdt tdu tna tnb tnc tnd tnn tno tns tnt to- toa tob toc tod ton too tos tot tou tsa tsb tsc tsd tsn tso tss tst tsu tta ttb ttc ttd ttn tto tts ttt ttu tua tub tuc tud tun tuo tus tut tuu ua- uaa uab uac uad uan uao uas uat uau uba ubb ubc ubn ubo ubs ubt ubu uca ucb ucc ucd ucn uco ucs uct ucu uda udb udc udd udn udo uds udt udu un- una unb unc und unn uno uns unt unu uoa uob uoc uod uon uoo uos uot usa usb usc usd usn uso uss ust usu uta utb utc utd utn uto uts utt utu uua uuc uun uus uut uuu