a-a a-b a-c aaa aab aac aad aam aao aas aau ab- aba abb abc abd abm abo abs abu ac- aca acb acc acd acm aco acs acu ad- ada adb adc add adm ado ads adu ama amb amc amd amm amo ams amu aoa aob aoc aod aom aoo aos aou as- asa asb asc asd asm aso ass asu au- aua aub auc aud aum auo aus b-u baa bab bac bad bam bao bas bau bba bbb bbc bbd bbm bbo bbs bbu bca bcb bcc bcd bcm bco bcs bcu bda bdb bdc bdd bdm bdo bds bdu bma bmb bmc bmd bmm bmo bms bmu boa bob boc bod bom boo bos bou bsa bsb bsc bsd bsm bso bss bsu bua bub buc bud bum buo bus buu c-- caa cab cac cad cam cao cas cau cba cbb cbc cbd cbm cbo cbs cbu cca ccb ccc ccd ccm cco ccs ccu cda cdb cdc cdd cdm cdo cds cdu cma cmb cmc cmd cmm cmo cms cmu co- coa cob coc cod com coo cos cou csa csb csc csd csm cso css csu cua cub cuc cud cum cuo cus cuu daa dab dac dad dam dao das dau dba dbb dbc dbd dbm dbo dbs dbu dca dcb dcc dcd dcm dco dcs dcu dda ddb ddc ddd ddm ddo dds ddu dma dmb dmc dmd dmm dmo dms dmu doa dob doc dod dom doo dos dou dsa dsb dsc dsd dsm dso dss dsu dua dub duc dud dum duo dus m-o maa mab mac mad mam mao mas mau mba mbb mbc mbd mbm mbo mbs mbu mc- mca mcb mcc mcd mcm mco mcs mcu mda mdb mdc mdd mdm mdo mds mdu mma mmb mmc mmd mmm mmo mms mmu moa mob moc mod mom moo mos mou msa msb msc msd msm mso mss msu mua mub muc mud mum mus muu oaa oab oac oad oam oao oas oau ob- oba obb obc obd obm obo obs obu oc- oca ocb occ ocd ocm oco ocs ocu oda odb odc odd odm odo ods odu om- oma omb omc omd omm omo oms omu oo- ooa oob ooc ood oom ooo oos os- osa osb osc osd osm oso oss osu ou- oua ouc oud oum ouo ous saa sab sac sad sam sao sas sau sba sbb sbc sbd sbm sbo sbs sbu sca scb scc scd scm sco scs scu sda sdb sdc sdd sdm sdo sds sdu sma smb smc smd smm smo sms smu soa sob soc sod som soo sos sou ss- ssa ssb ssc ssd ssm sso sss ssu sua sub suc sud sum suo sus suu ua- uaa uab uac uad uam uao uas uau uba ubb ubc ubo ubs ubu uca ucb ucc ucd ucm uco ucs ucu uda udb udc udd udm udo uds udu um- uma umb umc umd umm umo ums umu uoa uob uoc uod uom uoo uos usa usb usc usd usm uso uss usu uua uuc uum uus uuu