-al a-a a-b a-c aaa aab aac aal aap aas ab- aba abb abc abl abp abs ac- aca acb acc acl acp acs al- ala alb alc all alp als ap- apa apb apc apl app aps as- asa asb asc asl asp ass b-p baa bab bac bal bap bas bba bbb bbc bbl bbp bbs bca bcb bcc bcl bcp bcs bla blb blc bll blp bls bpa bpb bpc bpl bpp bps bsa bsb bsc bsl bsp bss c-- caa cab cac cal cap cas cba cbb cbc cbl cbp cbs cca ccb ccc ccl ccp ccs cl- cla clb clc cll clp cls cpa cpb cpc cpl cpp cps csa csb csc csl csp css l-p la- laa lab lac lal lap las lba lbb lbc lbl lbp lbs lca lcb lcc lcl lcp lcs lla llb llc lll llp lls lpa lpb lpc lpl lpp lps lsa lsb lsc lsl lsp lss p-p paa pab pac pal pap pas pba pbb pbc pbl pbp pbs pca pcb pcc pcl pcp pcs pla plb plc pll plp pls ppa ppb ppc ppl ppp pps ps- psa psb psc psl psp pss saa sab sac sal sap sas sba sbb sbc sbl sbp sbs sca scb scc scl scp scs sla slb slc sll slp sls spa spb spc spl spp sps ss- ssa ssb ssc ssl ssp sss