a-a a-b a-c aaa aab aac aam aan aao aar aax aay ab- aba abb abc abm abn abo abr abx aby ac- aca acb acc acm acn aco acr acx acy ama amb amc amm amn amo amr amx amy an- ana anb anc anm ann ano anr anx any aoa aob aoc aom aon aoo aor aox ar- ara arb arc arm arn aro arr arx ary ax- axa axm axn axo axr axx ay- aya ayc ayn ayo ayr ayx baa bab bac bam ban bao bar bax bay bba bbb bbc bbm bbn bbo bbr bbx bby bca bcb bcc bcm bcn bco bcr bcx bcy bma bmb bmc bmm bmn bmo bmr bmx bna bnb bnc bnn bno bnr bnx boa bob boc bom bon boo bor box boy bra brb brm brn bro brr brx bry bxb bxm bxn bxo bxx by- bya byc bym byn byo byr c-- caa cab cac cam can cao car cax cay cba cbb cbc cbm cbn cbo cbr cbx cby cca ccb ccc ccm ccn cco ccr ccx cma cmb cmc cmm cmn cmo cmr cmx cmy cn- cna cnb cnc cnm cnn cno cnr cnx cny co- coa cob coc com con coo cor cox coy cra crb crc crm crn cro crr crx cry cxc cxo cxr cxx cya cyb cyc cym cyn cyo cyr m-o m-r maa mab mac mam man mao mar max may mba mbb mbc mbm mbo mbr mbx mc- mca mcb mcc mcm mcn mco mcr mcx mma mmb mmc mmm mmn mmo mmr mmx mna mnb mnc mnm mnn mno mnr moa mob moc mom mon moo mor mox moy mra mrb mrc mrm mrn mro mrr mrx mry mxa mxc mxn mxr my- mya myb myc mym myn myo myr myx naa nab nac nam nan nao nar nax nay nba nbb nbc nbm nbn nbo nbr nbx nca ncb ncc ncm ncn nco ncr ncx nma nmb nmc nmm nmn nmo nmr nna nnb nnc nnm nnn nno no- noa nob noc nom non noo nor nox noy nra nrb nrc nrm nrn nro nrr nrx nry nxc nya nyc nym nyn nyo nyx nyy oaa oab oac oam oan oao oar oax ob- oba obb obc obm obn obo obr obx oby oc- oca ocb occ ocm ocn oco ocr ocx om- oma omb omc omm omn omo omr omx omy on- ona onb onc onn ono onr onx ony oo- ooa oob ooc oom oon ooo oor oox or- ora orb orc orm orn oro orr orx ory ox- oxa oxb oxc oxn oxo oxx oxy oya oyo ra- raa rab rac ram ran rao rar rax ray rba rbb rbc rbm rbn rbo rbr rbx rca rcb rcc rcm rcn rco rcr rcx rma rmb rmc rmm rmn rmo rmr rmx rna rnb rnc rnm rnn rno rnr rny roa rob roc rom ron roo ror rox roy rra rrb rrc rrm rrn rrr rxr ry- rya ryc rym ryn ryo ryr ryy xaa xac xam xan xar xbc xbr xbx xcb xcr xcx xma xmc xmm xmo xmr xmx xna xnc xno xoa xoc xom xon xoo xor xox xrc xrx xry xxo xxx xxy xyr xyy yaa yab yac yam yan yao yar yax yay ybc ybm ybr yby yca ycc yco ycy yma ymc ymm ymo yna ynn yny yob yoc yom yon yoo yor yox yoy yra yrc yrn yro yxa yxy yyb yyc yyy