-al a-a a-b a-c aaa aab aac aak aal aap aas ab- aba abb abc abk abl abp abs ac- aca acb acc ack acl acp acs aka akb akc akk akl akp aks al- ala alb alc alk all alp als ap- apa apb apc apk apl app aps as- asa asb asc ask asl asp ass b-p baa bab bac bak bal bap bas bba bbb bbc bbk bbl bbp bbs bca bcb bcc bck bcl bcp bcs bka bkb bkc bkk bkl bkp bks bla blb blc blk bll blp bls bpa bpb bpc bpl bpp bps bsa bsb bsc bsk bsl bsp bss c-- caa cab cac cak cal cap cas cba cbb cbc cbk cbl cbp cbs cca ccb ccc cck ccl ccp ccs cka ckb ckc cks cl- cla clb clc clk cll clp cls cpa cpb cpc cpk cpl cpp cps csa csb csc csk csl csp css ka- kaa kab kac kak kal kap kas kba kbb kbc kbk kbl kbp kbs kca kcb kcc kck kcl kcp kcs kkb kkc kkk kkl kkp kks kl- kla klb klc kls kpa kpc kpk kpl kpp kps ksa ksb ksc ksk ksl ksp kss l-p la- laa lab lac lak lal lap las lba lbb lbc lbk lbl lbp lbs lca lcb lcc lck lcl lcp lcs lka lkb lkl lkp lks lla llb llc llk lll llp lls lpa lpb lpc lpk lpl lpp lps lsa lsb lsc lsk lsl lsp lss p-p paa pab pac pak pal pap pas pba pbb pbc pbk pbl pbp pbs pca pcb pcc pck pcl pcp pcs pka pkb pkc pkl pkp pks pla plb plc plk pll plp pls ppa ppb ppc ppk ppl ppp pps ps- psa psb psc psk psl psp pss saa sab sac sak sal sap sas sba sbb sbc sbk sbl sbp sbs sca scb scc sck scl scp scs sk- ska skb skc skk skl skp sks sla slb slc slk sll slp sls spa spb spc spk spl spp sps ss- ssa ssb ssc ssk ssl ssp sss