a-a a-b a-c aaa aab aac aak aam aao aap aar ab- aba abb abc abk abm abo abp abr ac- aca acb acc ack acm aco acp acr aka akb akc akk akm ako akp akr ama amb amc amk amm amo amp amr aoa aob aoc aok aom aoo aop aor ap- apa apb apc apk apm apo app apr ar- ara arb arc ark arm aro arp arr b-p baa bab bac bak bam bao bap bar bba bbb bbc bbk bbm bbo bbp bbr bca bcb bcc bck bcm bco bcp bcr bka bkb bkc bkk bkm bko bkp bkr bma bmb bmc bmk bmm bmo bmp bmr boa bob boc bok bom boo bop bor bpa bpb bpc bpm bpo bpp bpr bra brb brk brm bro brp brr c-- caa cab cac cak cam cao cap car cba cbb cbc cbk cbm cbo cbp cbr cca ccb ccc cck ccm cco ccp ccr cka ckb ckc ckm cko cma cmb cmc cmk cmm cmo cmp cmr co- coa cob coc cok com coo cop cor cpa cpb cpc cpk cpm cpo cpp cpr cra crb crc crk crm cro crp crr ka- kaa kab kac kak kam kao kap kar kba kbb kbc kbk kbm kbo kbp kbr kca kcb kcc kck kcm kcp kcr kkb kkc kkk kkm kkp kkr kma kmb kmc kmk kmm kmo kmp koa kob koc kok kom koo kop kor kpa kpc kpk kpm kpo kpp kpr kra krc krk kro krp krr m-o m-r maa mab mac mak mam mao map mar mba mbb mbc mbk mbm mbo mbp mbr mc- mca mcb mcc mck mcm mco mcp mcr mka mkb mkc mkk mkm mko mkp mkr mma mmb mmc mmk mmm mmo mmp mmr moa mob moc mok mom moo mop mor mpa mpb mpc mpk mpm mpo mpp mpr mra mrb mrc mrk mrm mro mrp mrr oaa oab oac oak oam oao oap oar ob- oba obb obc obk obm obo obp obr oc- oca ocb occ ock ocm oco ocp ocr oka okb okc okk oko okp okr om- oma omb omc omm omo omp omr oo- ooa oob ooc ook oom ooo oop oor op- opa opb opc opk opm opo opp opr or- ora orb orc ork orm oro orp orr p-p paa pab pac pak pam pao pap par pba pbb pbc pbk pbm pbo pbp pbr pca pcb pcc pck pcm pco pcp pcr pka pkb pkc pkm pko pkp pkr pma pmb pmc pmk pmm pmo pmp pmr poa pob poc pok pom poo pop por ppa ppb ppc ppk ppm ppo ppp ppr pra prb prc prk prm pro prp prr ra- raa rab rac rak ram rao rap rar rba rbb rbc rbk rbm rbo rbp rbr rca rcb rcc rcm rco rcp rcr rkb rkc rkk rkm rko rkp rma rmb rmc rmm rmo rmp rmr roa rob roc rok rom roo rop ror rpa rpb rpc rpk rpm rpo rpp rpr rra rrb rrc rrk rrm rrp rrr

a-ak a-ok aaaa aaab aaac aaam aaap aaar aaba aabb aabc aabm aabp aaca aacb aacc aack aacm aaco aacp aacr aaka aama aamb aamc aamo aamp aamr aaoo aapa aapc aapm aapo aara aarc aarm aaro aarp abaa abab abac abak abam abap abar abb- abba abbb abbo abbr abca abcb abcc abcp abcr abma abmb abmc aboa abob abok aboo abor abpa abpc abpm abpp abpr abra abrc abro acaa acab acac acap acar acba acca accc accm acco accp acma acmc acmp acoa acom acop acor acpa acpm acpr acr- acra acrc acrm acro acrr akaa akam akao akap akar akca akka akko akok akom akpo akr- akra amaa amac amam amap amar amb- amba ambo ambr amca amcc amco amka amm- amma ammo amob amoc amok amoo amor ampa ampc ampk ampm ampo amra amrc amro aoba aoca aokp aoma aopo aora aorb apac apak apam apao apap apar apba apbr apca apcb apcc apcm apco apcr apma apo- apoc apom apoo apop apor appa appc appr apra aprc apro arab arac arak aram arap arar arba arc- arca arcm arco arka arko arma armc armm armo aroa arob arom aroo aror arpa arr- arra arrc arrk arro arrr baaa baak baam baar baba babb babm babo babr bac- baca bacc back baco bak- baka bako bakr bama bamb bamc bamm bamp bapa bapc bapp bar- bara barb barc bark barm baro barr bbbb bbcm bbpr bbrc bcaa bcam bcap bcar bcbc bcbp bcca bccc bccm bcma bcmp bcor bcpp bcra bkpr bmaa bmoc bmop boab boac boak boar boba bobb bobo boca bock bocm boco boka boko boma bomb bomp boob booc book boom boop boor bopa bopp bor- bora bork borm boro borr bpcp bpmc bprc brab brac brak bram brao brca brcb brka brkb brmc broa brob broc brok brom broo bror brrm brrr c-bo caaa caab caac caam caap caba cabo cac- caca cacc cack cacm caco cacr caka cama camb camc camk camm camo camp caor capa capb capc capm capo capp cara carb carc cark carm caro carp carr cbac cbar cbbc cbca cbcc cbcm cbcp cbcr cbka cbkm cbko cbkr cbpc cbpp cbrm ccaa ccab ccac ccam ccap ccar ccba ccbc ccca cccb cccc cccm cccp cckm ccma ccmb ccmc ccmm ccmp ccob ccoc ccom ccpa ccpm ccpp ccpr ccra ccrc ccrp ckac ckbc ckck ckcm ckco ckmo ckmp ckoa ckob ckoc ckom ckoo ckor ckpc ckpr ckrc ckrm cmaa cmac cmap cmba cmbc cmcc cmmb cmmc cmoc cmpa cmpc cmpk cmpp cmra cmrr coak coba cobb cobo coca cock coco cocp cok- coka coko com- coma comb comc comm como comp comr coob cook coom coop copa copo copp copr cor- cora corb corc cork corm coro corp corr cpaa cpac cpam cpap cpbc cpca cpcm cpma cpmp cppa cppm cprm crab crac cram crap crar crbc crca crcc crcr crkc crkp crmb crmo