-al a-a a-b a-c aaa aab aac aae aal aap aas ab- aba abb abc abe abl abp abs ac- aca acb acc ace acl acp acs aea aeb aec aee ael aep aes al- ala alb alc ale all alp als ap- apa apb apc ape apl app aps as- asa asb asc ase asl asp ass b-p baa bab bac bae bal bap bas bba bbb bbc bbe bbl bbp bbs bca bcb bcc bce bcl bcp bcs be- bea beb bec bee bel bep bes bla blb blc ble bll blp bls bpa bpb bpc bpe bpl bpp bps bsa bsb bsc bse bsl bsp bss c-- caa cab cac cae cal cap cas cba cbb cbc cbe cbl cbp cbs cca ccb ccc cce ccl ccp ccs ce- cea ceb cec cee cel cep ces cl- cla clb clc cle cll clp cls cpa cpb cpc cpe cpl cpp cps csa csb csc cse csl csp css eaa eab eac eae eal eap eas eba ebb ebc ebe ebl ebp ebs ec- eca ecb ecc ece ecl ecs eea eeb eec eee eel eep ees ela elb elc ele ell elp els ep- epa epb epc epe epl epp eps es- esa esb esc ese esl esp ess l-p la- laa lab lac lae lal lap las lba lbb lbc lbe lbl lbp lbs lca lcb lcc lce lcl lcp lcs lea leb lec lee lel lep les lla llb llc lle lll llp lls lpa lpb lpc lpe lpl lpp lps lsa lsb lsc lse lsl lsp lss p-p paa pab pac pae pal pap pas pba pbb pbc pbe pbl pbp pbs pca pcb pcc pce pcl pcp pcs pea peb pec pee pel pep pes pla plb plc ple pll plp pls ppa ppb ppc ppe ppl ppp pps ps- psa psb psc pse psl psp pss saa sab sac sae sal sap sas sba sbb sbc sbe sbl sbp sbs sca scb scc sce scl scp scs se- sea seb sec see sel sep ses sla slb slc sle sll slp sls spa spb spc spe spl spp sps ss- ssa ssb ssc sse ssl ssp sss