a-a a-b a-c aaa aab aac aae aaf aam aao aas aau ab- aba abb abc abe abf abm abo abs abu ac- aca acb acc ace acf acm aco acs acu aea aeb aec aee aef aem aeo aes aeu af- afa afb afc afe aff afm afo afs afu ama amb amc ame amf amm amo ams amu aoa aob aoc aoe aof aom aoo aos aou as- asa asb asc ase asf asm aso ass asu au- aua aub auc aue auf aum auo aus b-u baa bab bac bae baf bam bao bas bau bba bbb bbc bbe bbf bbm bbo bbs bbu bca bcb bcc bce bcf bcm bco bcs bcu be- bea beb bec bee bef bem beo bes beu bfa bfb bfc bfe bff bfm bfo bfs bfu bma bmb bmc bme bmf bmm bmo bms bmu boa bob boc boe bof bom boo bos bou bsa bsb bsc bse bsf bsm bso bss bsu bua bub buc bue buf bum buo bus buu c-- caa cab cac cae caf cam cao cas cau cba cbb cbc cbe cbf cbm cbo cbs cbu cca ccb ccc cce ccf ccm cco ccs ccu ce- cea ceb cec cee cef cem ceo ces ceu cfa cfb cfc cfe cff cfm cfo cfs cfu cma cmb cmc cme cmf cmm cmo cms cmu co- coa cob coc coe cof com coo cos cou csa csb csc cse csf csm cso css csu cua cub cuc cue cuf cum cuo cus cuu eaa eab eac eae eaf eam eao eas eau eba ebb ebc ebe ebf ebm ebo ebs ebu ec- eca ecb ecc ece ecf ecm eco ecs ecu eea eeb eec eee eef eem eeo ees ef- efa efb efc efe eff efm efo efs em- ema emb emc eme emf emm emo ems emu eo- eoa eob eoc eoe eof eom eoo eos eou es- esa esb esc ese esf esm eso ess esu eu- eua eub euc eue euf eus faa fab fac fae faf fam fao fas fau fba fbb fbc fbe fbf fbm fbo fbs fbu fca fcb fcc fce fcf fcm fco fcs fcu fea feb fec fee fef fem feo fes feu ffa ffc ffe fff ffm ffo ffs ffu fma fmb fmc fme fmf fmm fmo fms fmu foa fob foc foe fof fom foo fos fou fsa fsb fsc fse fsf fsm fso fss fsu fua fub fue fuf fum fuo fus fuu m-f m-o maa mab mac mae maf mam mao mas mau mba mbb mbc mbe mbf mbm mbo mbs mbu mc- mca mcb mcc mce mcf mcm mco mcs mcu mea meb mec mee mef mem meo mes meu mfa mfb mfc mfe mff mfm mfo mfs mfu mma mmb mmc mme mmf mmm mmo mms mmu moa mob moc moe mof mom moo mos mou msa msb msc mse msf msm mso mss msu mua mub muc mue muf mum mus muu oaa oab oac oae oaf oam oao oas oau ob- oba obb obc obe obf obm obo obs obu oc- oca ocb occ ocf ocm oco ocs ocu oea oeb oec oee oef oem oeo oes of- ofa ofb ofc ofe off ofm ofo ofs ofu om- oma omb omc ome omf omm omo oms omu oo- ooa oob ooc oof oom ooo oos os- osa osb osc ose osf osm oso oss osu ou- oua ouc oue ouf oum ouo ous saa sab sac sae saf sam sao sas sau sba sbb sbc sbe sbf sbm sbo sbs sbu sca scb scc sce scf scm sco scs scu se- sea seb sec see sef sem seo ses seu sfa sfb sfc sfe sff sfm sfo sfs sfu sma smb smc sme smf smm smo sms smu soa sob soc soe sof som soo sos sou ss- ssa ssb ssc sse ssf ssm sso sss ssu sua sub suc sue suf sum suo sus suu ua- uaa uab uac uae uaf uam uao uas uau uba ubb ubc ube ubf ubo ubs ubu uca ucb ucc uce ucf ucm uco ucs ucu uea ueb uec uee uef uem ues ufa ufc ufe uff ufm ufo ufs ufu um- uma umb umc ume umf umm umo ums umu uoa uob uoc uoe uom uoo uos usa usb usc use usf usm uso uss usu uua uuc uue uum uus uuu