-al -er a-a a-b a-c aaa aab aac aae aal aan aap aar ab- aba abb abc abe abl abn abp abr ac- aca acb acc ace acl acn acp acr aea aeb aec aee ael aen aep aer al- ala alb alc ale all aln alp alr an- ana anb anc ane anl ann anp anr ap- apa apb apc ape apl apn app apr ar- ara arb arc are arl arn arp arr b-p baa bab bac bae bal ban bap bar bba bbb bbc bbe bbl bbn bbp bbr bca bcb bcc bce bcl bcn bcp bcr be- bea beb bec bee bel ben bep ber bla blb blc ble bll bln blp blr bna bnb bnc bne bnl bnn bnp bnr bpa bpb bpc bpe bpl bpn bpp bpr bra brb bre brl brn brp brr c-- caa cab cac cae cal can cap car cba cbb cbc cbe cbl cbn cbp cbr cca ccb ccc cce ccl ccn ccp ccr ce- cea ceb cec cee cel cen cep cer cl- cla clb clc cle cll cln clp clr cn- cna cnb cnc cne cnl cnn cnp cnr cpa cpb cpc cpe cpl cpn cpp cpr cra crb crc cre crl crn crp crr eaa eab eac eae eal ean eap ear eba ebb ebc ebe ebl ebn ebp ebr ec- eca ecb ecc ece ecl ecn ecr eea eeb eec eee eel een eep eer ela elb elc ele ell eln elp elr en- ena enb enc ene enl enn enp enr ep- epa epb epc epe epl epn epp epr era erb erc ere erl ern erp err l-p la- laa lab lac lae lal lan lap lar lba lbb lbc lbe lbl lbp lbr lca lcb lcc lce lcl lcn lcp lcr lea leb lec lee lel len lep ler lla llb llc lle lll lln llp llr lna lnb lnc lne lnl lnn lnp lnr lpa lpb lpc lpe lpl lpn lpp lpr lra lrb lrc lrn lrp lrr naa nab nac nae nal nan nap nar nba nbb nbc nbe nbl nbn nbp nbr nca ncb ncc nce ncl ncn ncp ncr ne- nea neb nec nee nel nen nep ner nla nlb nlc nle nll nln nlp nlr nna nnb nnc nne nnl nnn nnp npa npb npc npe npl npn npp npr nra nrb nrc nre nrl nrn nrp nrr p-p paa pab pac pae pal pan pap par pba pbb pbc pbe pbl pbn pbp pbr pca pcb pcc pce pcl pcn pcp pcr pea peb pec pee pel pen pep per pla plb plc ple pll pln plp plr pn- pna pnb pnc pne pnl pnn pnp pnr ppa ppb ppc ppe ppl ppn ppp ppr pra prb prc pre prl prn prp prr ra- raa rab rac rae ral ran rap rar rba rbb rbc rbe rbl rbn rbp rbr rca rcb rcc rce rcl rcn rcp rcr re- rea reb rec ree rel ren rep rer rla rlc rle rll rln rlp rlr rna rnb rnc rnn rnp rnr rpa rpb rpc rpe rpl rpn rpp rpr rra rrb rrc rrl rrn rrp rrr