a-a a-b a-c aaa aab aac aah aao aap aar ab- aba abb abc abh abo abp abr ac- aca acb acc ach aco acp acr aha ahb ahc ahh aho ahp ahr aoa aob aoc aoh aoo aop aor ap- apa apb apc aph apo app apr ar- ara arb arc arh aro arp arr b-p baa bab bac bah bao bap bar bba bbb bbc bbh bbo bbp bbr bca bcb bcc bch bco bcp bcr bha bhb bhc bhh bho bhp bhr boa bob boc boh boo bop bor bpa bpb bpc bph bpo bpp bpr bra brb brh bro brp brr c-- caa cab cac cah cao cap car cba cbb cbc cbh cbo cbp cbr cca ccb ccc cch cco ccp ccr ch- cha chb chc chh cho chp chr co- coa cob coc coh coo cop cor cpa cpb cpc cph cpo cpp cpr cra crb crc crh cro crp crr haa hab hac hah hao hap har hba hbb hbc hbh hbo hbp hbr hca hcb hcc hch hco hcp hcr hha hhb hhc hhh hho hhp hhr hoa hob hoc hoh hoo hop hor hpa hpb hpc hph hpo hpp hpr hr- hra hrb hrc hrh hro hrp hrr oaa oab oac oah oao oap oar ob- oba obb obc obh obo obp obr oc- oca ocb occ och oco ocp ocr oha ohc ohh oho ohp ohr oo- ooa oob ooc ooh ooo oop oor op- opa opb opc oph opo opp opr or- ora orb orc orh oro orp orr p-p paa pab pac pah pao pap par pba pbb pbc pbo pbp pbr pca pcb pcc pch pco pcp pcr pha phb phc pho php phr poa pob poc poh poo pop por ppa ppb ppc pph ppo ppp ppr pra prb prc prh pro prp prr ra- raa rab rac rah rao rap rar rba rbb rbc rbh rbo rbp rbr rca rcb rcc rch rco rcp rcr rh- rha rhb rhc rhh rho rhp rhr roa rob roc roh roo rop ror rpa rpb rpc rph rpo rpp rpr rra rrb rrc rrh rrp rrr

a-ha aaaa aaab aaac aaah aaap aaar aaba aabb aabc aabh aabp aaca aacb aacc aach aaco aacp aacr aaha aaoo aapa aapc aaph aapo aara aarc aaro aarp abaa abab abac abap abar abb- abba abbb abbo abbr abca abcb abcc abch abcp abcr abha abho abhr aboa abob aboh aboo abor abpa abpc abpp abpr abra abrc abro acaa acab acac acap acar acba acca accc acch acco accp acha achh acho achp achr acoa acoh acop acor acpa acpr acr- acra acrc acro acrr ahab ahac ahah ahar ahha ahoa ahop ahor ahra ahrc ahrr aoah aoba aoca aopo aora aorb apac apah apao apap apar apba apbr apca apcb apcc apco apcr aph- apha aphc apo- apoc apoo apop apor appa appc apph appr apra aprc apro arab arac arah arap arar arba arbh arc- arca arch arco arh- aroa arob aroo aror arpa arr- arra arrc arrh arro arrr baaa baah baar baba babb babo babr bac- baca bacc bach baco baha baho bahr baoh bapa bapc bapp bar- bara barb barc barh baro barr bbbb bbch bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bcor bcpp bcra bhao bhar bhca bhcc bhor bhra boab boac boar boba bobb bobo boca boch boco boha boho bohr boob booc booh boop boor bopa bopp bor- bora borh boro borr bpcp bphc bprc brab brac brah brao brca brcb broa brob broc broh broo bror brrr c-bo caaa caab caac caah caap caba cabo cac- caca cacc cach caco cacr caha caor capa capb capc caph capo capp cara carb carc caro carp carr cbac cbar cbbc cbca cbcc cbcp cbcr cbha cbpc cbpp cbrh ccaa ccab ccac ccap ccar ccba ccbc ccca cccb cccc cccp ccha cchp cchr ccob ccoc ccpa ccpp ccpr ccra ccrc ccrp chaa chab chac chah chao chap char chbp chca chch chcp chha choc choh choo chop chor chpa chpp chpr chra chrb chrc chro chrp chrr coba cobb cobh cobo coca coch coco cocp coha coho coob cooh coop copa coph copo copp copr cor- cora corb corc coro corp corr cpaa cpac cpap cpbc cpca cpha cppa crab crac crap crar crbc crca crcc crcr crob croc croh croo crop cror crpc haab haar haba habo haco haha haho haor hapa happ hara harc harh haro harp harr hbar hboc hcap hcbc hcca hccb hccc hcch hcpc hcrp hhaa hhhh hhpa hhpc hoac hoap hoar hoba hobo hoca hoch hocr hoha hoho hoop hoor hopa hopo hopp hora horc horo horr hpac hpao hpcc hrac hrap hrob hrpc hrpp hrrc oahp oaph oara obba obbo obor obra obrh obro ocab ocac ocap ocbc occa occc ocha ocpa ocpp ocra ocro ocrr ohba ohcc ohho ohob ohoh ohra ooaa ooba oocr ooha ooho oooh oooo oora opah opap opar opca opo- opor oppa oppo opra orab orac orah orao orar orba orbb orbo orca orch orco oro- oror orpc orph orra orro paap paar paba paca pach paco paha paho pahp paoc paoh papa papb papp papr par- para parc paro parp parr pbac pbar pbcc pboc pbpa pcaa pcap pcba pcbc pcca pccc pcha pchp pcoa pcpb pcpp pcra pcrc phah phar phcc phob phoh phoo phpa phrr poar poba pobo poca poch poco poha pooh poop poor pop- popa popc popo popp pora porb porc poro porr ppac ppap ppar ppcc ppoa pppa pppo pppp pprc prao prar prbc prca prcc prcp pro- proa prob proc proo prop raab raba rabb rabo rac- raca racc rach raco raha rahr raob raoc raoh raop rapa rapc raph rapp rara rarb raro rbbb rbbr rboh rcac rcbc rcbo rccb rccc rchb rcpo rhap rhcp rhoa rhob rhoc rhoh roab roap roar rob- roba robb robo roca rocc roch roco roha rohr roob roop roor ropa ropo rora rorc roro rpca rpho