-al -ol a-a a-b a-c aaa aab aac aak aal aao aap aar ab- aba abb abc abk abl abo abp abr ac- aca acb acc ack acl aco acp acr aka akb akc akk akl ako akp akr al- ala alb alc alk all alo alp alr aoa aob aoc aok aol aoo aop aor ap- apa apb apc apk apl apo app apr ar- ara arb arc ark arl aro arp arr b-p baa bab bac bak bal bao bap bar bba bbb bbc bbk bbl bbo bbp bbr bca bcb bcc bck bcl bco bcp bcr bka bkb bkc bkk bkl bko bkp bkr bla blb blc blk bll blo blp blr boa bob boc bok bol boo bop bor bpa bpb bpc bpl bpo bpp bpr bra brb brk brl bro brp brr c-- caa cab cac cak cal cao cap car cba cbb cbc cbk cbl cbo cbp cbr cca ccb ccc cck ccl cco ccp ccr cka ckb ckc cko cl- cla clb clc clk cll clo clp clr co- coa cob coc cok col coo cop cor cpa cpb cpc cpk cpl cpo cpp cpr cra crb crc crk crl cro crp crr ka- kaa kab kac kak kal kao kap kar kba kbb kbc kbk kbl kbo kbp kbr kca kcb kcc kck kcl kcp kcr kkb kkc kkk kkl kkp kkr kl- kla klb klc klo klr koa kob koc kok kol koo kop kor kpa kpc kpk kpl kpo kpp kpr kra krc krk krl kro krp krr l-p la- laa lab lac lak lal lao lap lar lba lbb lbc lbk lbl lbo lbp lbr lca lcb lcc lck lcl lco lcp lcr lka lkb lkl lkp lkr lla llb llc llk lll llo llp llr loa lob loc lok lol loo lop lor lpa lpb lpc lpk lpl lpo lpp lpr lra lrb lrc lrk lro lrp lrr oaa oab oac oak oal oao oap oar ob- oba obb obc obk obl obo obp obr oc- oca ocb occ ock ocl oco ocp ocr oka okb okc okk okl oko okp okr ola olb olc olk oll olo olp oo- ooa oob ooc ook ool ooo oop oor op- opa opb opc opk opl opo opp opr or- ora orb orc ork orl oro orp orr p-p paa pab pac pak pal pao pap par pba pbb pbc pbk pbl pbo pbp pbr pca pcb pcc pck pcl pco pcp pcr pka pkb pkc pkl pko pkp pkr pla plb plc plk pll plo plp plr poa pob poc pok pol poo pop por ppa ppb ppc ppk ppl ppo ppp ppr pra prb prc prk prl pro prp prr ra- raa rab rac rak ral rao rap rar rba rbb rbc rbk rbl rbo rbp rbr rca rcb rcc rcl rco rcp rcr rkb rkc rkk rko rkp rla rlc rll rlo rlp rlr roa rob roc rok rol roo rop ror rpa rpb rpc rpk rpl rpo rpp rpr rra rrb rrc rrk rrl rrp rrr

a-ak a-ok aaaa aaab aaac aaal aaap aaar aaba aabb aabc aabl aabp aaca aacb aacc aack aacl aaco aacp aacr aaka aala aalc aall aalo aaoo aapa aapc aapl aapo aara aarc aaro aarp abaa abab abac abak abal abap abar abb- abba abbb abbo abbr abca abcb abcc abcl abcp abcr abla ablo aboa abob abok abol aboo abor abpa abpc abpp abpr abra abrc abro acaa acab acac acap acar acba acbl acca accc acco accp acla aclc aclr acoa acol acop acor acpa acpr acr- acra acrc acro acrr akaa akal akao akap akar akca akka akko aklo akok akpo akr- akra al-p alaa alac alak alal alao alap alar alb- alba albc albo alca alcc alco alk- alka alkb alko all- alla alll allo allr aloa aloc alok alol aloo alop alor alpa alpl alpo alro aoba aoca aokp aola aopo aora aorb apac apak apal apao apap apar apba apbr apca apcb apcc apco apcr apl- apla aplp apo- apoc apoo apop apor appa appc appl appr apra aprc apro arab arac arak aral arap arar arba arc- arca arco arka arko arla arlo aroa arob aroo aror arpa arpl arr- arra arrc arrk arro arrr baaa baak baal baar baba babb babo babr bac- baca bacc back baco bak- baka bakl bako bakr bala balc balk ball balo baol bapa bapc bapp bar- bara barb barc bark baro barr bbbb bblb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bccl bcor bcpl bcpp bcra bkpr blaa blab blac blak blkb blob bloc blok bloo blop blrc boab boac boak boal boar boba bobb bobo boca bock boco boka boko bola bolk boll bolo boob booc book bool boop boor bopa bopp bor- bora bork boro borr bpcp bprc brab brac brak brao brca brcb brka brkb brlp broa brob broc brok brol broo bror brrr c-bo caaa caab caac caal caap caba cabo cac- caca cacc cack caco cacr caka cala calc calk call calo calp caol caor capa capb capc capo capp cara carb carc cark carl caro carp carr cbac cbal cbar cbbc cbca cbcc cbcl cbcp cbcr cbka cbkl cbko cbkr cblb cblc cbol cbpc cbpp cbrl ccaa ccab ccac ccap ccar ccba ccbc ccca cccb cccc cccl cccp ccla cclc ccob ccoc ccpa ccpl ccpp ccpr ccra ccrc ccrl ccrp ckac ckbc ckck ckcl ckco ckoa ckob ckoc ckoo ckor ckpc ckpr ckrc clab clap clar clob clok cloo clop clor clpb clpp clra clro coak coal coba cobb cobo coca cock coco cocp cok- coka coko col- cola colb colk coll colo colp coob cook cool coop copa copo copp copr cor- cora corb corc cork corl coro corp corr cpaa cpac cpap cpbc cpca cplc cppa crab crac crap crar crbc crca crcc crcr crkc crkl crkp crob croc crok crol croo crop cror crpc k-lo kaaa kaab kaak kaal kaap kaar kaba kabb kabc kabo