-al -er a-a a-b a-c aaa aab aac aae aak aal aap aar ab- aba abb abc abe abk abl abp abr ac- aca acb acc ace ack acl acp acr aea aeb aec aee aek ael aep aer aka akb akc ake akk akl akp akr al- ala alb alc ale alk all alp alr ap- apa apb apc ape apk apl app apr ar- ara arb arc are ark arl arp arr b-p baa bab bac bae bak bal bap bar bba bbb bbc bbe bbk bbl bbp bbr bca bcb bcc bce bck bcl bcp bcr be- bea beb bec bee bek bel bep ber bka bkb bkc bke bkk bkl bkp bkr bla blb blc ble blk bll blp blr bpa bpb bpc bpe bpl bpp bpr bra brb bre brk brl brp brr c-- caa cab cac cae cak cal cap car cba cbb cbc cbe cbk cbl cbp cbr cca ccb ccc cce cck ccl ccp ccr ce- cea ceb cec cee cek cel cep cer cka ckb ckc cl- cla clb clc cle clk cll clp clr cpa cpb cpc cpe cpk cpl cpp cpr cra crb crc cre crk crl crp crr eaa eab eac eae eak eal eap ear eba ebb ebc ebe ebk ebl ebp ebr ec- eca ecb ecc ece eck ecl ecr eea eeb eec eee eek eel eep eer eka ekb ekc eke ekl ekp ekr ela elb elc ele elk ell elp elr ep- epa epb epc epe epl epp epr era erb erc ere erk erl erp err ka- kaa kab kac kae kak kal kap kar kba kbb kbc kbe kbk kbl kbp kbr kca kcb kcc kce kck kcl kcp kcr ke- kea keb kec kee kek kel kep ker kkb kkc kke kkk kkl kkp kkr kl- kla klb klc klr kpa kpc kpe kpk kpl kpp kpr kra krc krk krl krp krr l-p la- laa lab lac lae lak lal lap lar lba lbb lbc lbe lbk lbl lbp lbr lca lcb lcc lce lck lcl lcp lcr lea leb lec lee lek lel lep ler lka lkb lkl lkp lkr lla llb llc lle llk lll llp llr lpa lpb lpc lpe lpk lpl lpp lpr lra lrb lrc lrk lrp lrr p-p paa pab pac pae pak pal pap par pba pbb pbc pbe pbk pbl pbp pbr pca pcb pcc pce pck pcl pcp pcr pea peb pec pee pek pel pep per pka pkb pkc pke pkl pkp pkr pla plb plc ple plk pll plp plr ppa ppb ppc ppe ppk ppl ppp ppr pra prb prc pre prk prl prp prr ra- raa rab rac rae rak ral rap rar rba rbb rbc rbe rbk rbl rbp rbr rca rcb rcc rce rcl rcp rcr re- rea reb rec ree rek rel rep rer rkb rkc rke rkk rkp rla rlc rle rll rlp rlr rpa rpb rpc rpe rpk rpl rpp rpr rra rrb rrc rrk rrl rrp rrr

a-ak a-be aaaa aaab aaac aaae aaal aaap aaar aaba aabb aabc aabl aabp aaca aacb aacc aace aack aacl aacp aacr aaea aaec aaep aaka aake aala aalc aale aall aapa aapc aapl aara aarc aare aarp abaa abab abac abae abak abal abap abar abb- abba abbb abbe abbr abca abcb abcc abcl abcp abcr abec abee abel aber abla able abpa abpc abpp abpr abra abrc acaa acab acac acae acap acar acba acbl acca accc acce accp ace- acea acec acek acel acer acke acla aclc acle aclr acpa acpe acpr acr- acra acrc acre acrr aeac aeap aecb aecl aeer aeka aela aelc aelp aer- aera aerc akaa akae akal akap akar akca akee akel aker akka akle akr- akra akre al-p alaa alac alae alak alal alap alar alb- alba albc albe alca alcc alce alea alec alee alek alep aler alk- alka alkb alke all- alla alle alll allr alpa alpe alpl apac apak apal apap apar apba apbr apca apcb apcc apcr apea apec apel apep aper apke apl- apla aple aplp appa appc appl appr apra aprc apre arab arac arae arak aral arap arar arba arbe arc- arca arce area arec aree arek arel arep arka arke arla arle arpa arpe arpl arr- arra arrc arre arrk arrr baaa baak baal baar baba babb babe babr bac- baca bacc bace back baek bael baer bak- baka bake bakl bakr bala balc bale balk ball bapa bapc bape bapp bar- bara barb barc bare bark barr bbbb bbeb bblb bbpr bbrc bcaa bcap bcar bcbc bcbp bcca bccc bccl bcec bcer bcpl bcpp bcra beak beal beap bear beba bebb bebe beca beck beeb beek beel beep beer beka beke bela bele belk bell belp bera berc bere berk berr bkpr blaa blab blac blae blak blea bleb blee blek blkb blrc bpcp bpea bpel bprc brab brac brae brak brca brcb brce brea breb brec bree brek brel brep brer brka brkb brlp brrr caaa caab caac caal caap caba cabe cac- caca cacc cace cack cacr caec caer caka cake cala calc cale calk call calp capa capb capc cape capp cara carb carc care cark carl carp carr cbac cbal cbar cbbc cbca cbcc cbce cbcl cbcp cbcr cbea cbec cbee cber cbka cbkl cbkr cblb cblc cbpc cbpp cbre cbrl ccaa ccab ccac ccap ccar ccba ccbc ccca cccb cccc cccl cccp ccee ccel ccla cclc ccpa ccpe ccpl ccpp ccpr ccra ccrc ccre ccrl ccrp ceac ceal cear ceba cebp cec- ceca cece cecp ceeb ceec ceel ceke cel- cela celc cele cell cepa cepc cepe cepp cepr cer- cera cerc cere cerl cerp ckac ckbc ckbe ckck ckcl cker ckpc ckpr ckrc clab clap clar clea clec clee clek clep cler clpb clpp clra cpaa cpac cpap cpbc cpca cpce cpea cpeb cpep cper cplc cppa cpre crab crac crap crar crbc crca crcc crce crcr cre- crea creb