a-a a-b a-c aaa aab aac aan aao aap aar ab- aba abb abc abn abo abp abr ac- aca acb acc acn aco acp acr an- ana anb anc ann ano anp anr aoa aob aoc aon aoo aop aor ap- apa apb apc apn apo app apr ar- ara arb arc arn aro arp arr b-p baa bab bac ban bao bap bar bba bbb bbc bbn bbo bbp bbr bca bcb bcc bcn bco bcp bcr bna bnb bnc bnn bno bnp bnr boa bob boc bon boo bop bor bpa bpb bpc bpn bpo bpp bpr bra brb brn bro brp brr c-- caa cab cac can cao cap car cba cbb cbc cbn cbo cbp cbr cca ccb ccc ccn cco ccp ccr cn- cna cnb cnc cnn cno cnp cnr co- coa cob coc con coo cop cor cpa cpb cpc cpn cpo cpp cpr cra crb crc crn cro crp crr naa nab nac nan nao nap nar nba nbb nbc nbn nbo nbp nbr nca ncb ncc ncn nco ncp ncr nna nnb nnc nnn nno nnp no- noa nob noc non noo nop nor npa npb npc npn npo npp npr nra nrb nrc nrn nro nrp nrr oaa oab oac oan oao oap oar ob- oba obb obc obn obo obp obr oc- oca ocb occ ocn oco ocp ocr on- ona onb onc onn ono onp onr oo- ooa oob ooc oon ooo oop oor op- opa opb opc opn opo opp opr or- ora orb orc orn oro orp orr p-p paa pab pac pan pao pap par pba pbb pbc pbn pbo pbp pbr pca pcb pcc pcn pco pcp pcr pn- pna pnb pnc pnn pno pnp pnr poa pob poc pon poo pop por ppa ppb ppc ppn ppo ppp ppr pra prb prc prn pro prp prr ra- raa rab rac ran rao rap rar rba rbb rbc rbn rbo rbp rbr rca rcb rcc rcn rco rcp rcr rna rnb rnc rnn rno rnp rnr roa rob roc ron roo rop ror rpa rpb rpc rpn rpo rpp rpr rra rrb rrc rrn rrp rrr

-ana aaaa aaab aaac aaan aaap aaar aaba aabb aabc aabp aaca aacb aacc aacn aaco aacp aacr aana aanp aaon aaoo aapa aapc aapo aara aarc aaro aarp abaa abab abac aban abap abar abb- abba abbb abbo abbr abca abcb abcc abcn abcp abcr aboa abob abon aboo abor abpa abpc abpn abpp abpr abra abrc abro acaa acab acac acan acap acar acba acca accc acco accp acoa acon acop acor acpa acpr acr- acra acrc acro acrr ana- anaa anab anac anan anao anap anar anba anbb anbo anca ancc anco anna annb anno ano- anoa anon anor anp- anpa anpp anpr anrc aoba aoca aonb aono aopo aora aorb aorn apac apan apao apap apar apba apbr apca apcb apcc apcn apco apcr apna apno apo- apoc apon apoo apop apor appa appc appr apra aprc aprn apro arab arac aran arap arar arba arc- arca arco arna arno aroa arob aron aroo aror arpa arr- arra arrc arro arrr baaa baan baar baba babb babo babr bac- baca bacc bacn baco bana banc bann bano banp banr baon bapa bapc bapp bar- bara barb barc barn baro barr bbbb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcor bcpp bcra bnoc bnor bnpp bnrr boab boac boan boar boba bobb bobo boca boco bona bonc bonn bono boob booc boon boop boor bopa bopp bor- bora born boro borr bpcp bprc brab brac bran brao brca brcb brna brno broa brob broc bron broo bror brrr c-bo caaa caab caac caan caap caba cabo cac- caca cacc caco cacr cana canc cann cano canp caor capa capb capc capn capo capp cara carb carc carn caro carp carr cbac cbar cbbc cbca cbcc cbcn cbcp cbcr cbna cbpc cbpp cbrn ccaa ccab ccac ccap ccar ccba ccbc ccbn ccca cccb cccc cccp ccna ccnb ccnc ccnp ccnr ccob ccoc ccpa ccpn ccpp ccpr ccra ccrc ccrp cnaa cnac cnap cnbc cnbp cnco cncp cnna cnpa cnrc cnrr coan coba cobb cobo coca coco cocp con- cona conc conn cono coob coon coop copa copo copp copr cor- cora corb corc corn coro corp corr cpaa cpac cpan cpap cpbc cpca cpnb cppa crab crac cran crap crar crbc crca crcc crcr crna crob croc cron croo crop cror crpc naaa naab naac naan naar naba nabc nabo naca nacc naco nacp nan- nana nanb nann nano nanp naoc naor napa napb napo napp nara narc narn naro narp narr nbaa nbap nbar nbbc nbbo nbca nbcc nbco nbpa nbpp ncaa ncac ncap ncar ncba ncbc ncca nccc nccn nccp nccr ncna ncnc ncoa ncoc ncor ncpa ncpc ncra ncrc ncrp nnnn nnpr noaa noac noap noba nobc nobo noco non- nona nonn nono noo- noob noon nooo noop noor nor- nora norb norc norn noro norr npac npap npca npcc nppa nppc npra nrab nrap nrca nrna nroc nron nrpc nrpn nrrc oara oban obba obbo obon obor obra obro ocab ocac ocan ocap ocbc occa occc occn ocna ocon ocpa ocpp ocra ocro ocrr onab onan onar onc- onca onco onna onno onon onor onra ooaa ooba oocr oona oooo oora opan opap opar opca opo- opon opor oppa oppo opra orab orac oran orao orar orba orbb orbo orca orco orna ornc orno oro- oron oror orpc orra orro paan paap paar paba paca paco pan- pana panc pann pano paoc paon papa papb papp papr par- para parc parn paro parp parr pbac pban pbar pbcc pboc pbpa pcaa pcap pcba pcbc pcca pccc pcoa pcpb pcpn pcpp pcra pcrc pnac pnar pnca pnon pnpo pnpp pnra pnro poan poar poba pobo poca poco pona ponc pono ponp poon poop poor pop- popa popc popo popp pora porb porc porn poro porr ppac ppan ppap ppar ppcc ppoa