-al a-a a-b a-c aaa aab aac aad aal aap aas ab- aba abb abc abd abl abp abs ac- aca acb acc acd acl acp acs ad- ada adb adc add adl adp ads al- ala alb alc ald all alp als ap- apa apb apc apd apl app aps as- asa asb asc asd asl asp ass b-p baa bab bac bad bal bap bas bba bbb bbc bbd bbl bbp bbs bca bcb bcc bcd bcl bcp bcs bda bdb bdc bdd bdl bdp bds bla blb blc bld bll blp bls bpa bpb bpc bpd bpl bpp bps bsa bsb bsc bsd bsl bsp bss c-- caa cab cac cad cal cap cas cba cbb cbc cbd cbl cbp cbs cca ccb ccc ccd ccl ccp ccs cda cdb cdc cdd cdl cdp cds cl- cla clb clc cld cll clp cls cpa cpb cpc cpd cpl cpp cps csa csb csc csd csl csp css daa dab dac dad dal dap das dba dbb dbc dbd dbl dbp dbs dca dcb dcc dcd dcl dcp dcs dda ddb ddc ddd ddl ddp dds dl- dla dlb dlc dld dll dlp dls dpa dpb dpc dpd dpl dpp dps dsa dsb dsc dsd dsl dsp dss l-p la- laa lab lac lad lal lap las lba lbb lbc lbd lbl lbp lbs lca lcb lcc lcd lcl lcp lcs lda ldb ldc ldd ldl ldp lds lla llb llc lld lll llp lls lpa lpb lpc lpd lpl lpp lps lsa lsb lsc lsd lsl lsp lss p-p paa pab pac pad pal pap pas pba pbb pbc pbd pbl pbp pbs pca pcb pcc pcd pcl pcp pcs pda pdb pdc pdd pdl pdp pds pla plb plc pld pll plp pls ppa ppb ppc ppd ppl ppp pps ps- psa psb psc psd psl psp pss saa sab sac sad sal sap sas sba sbb sbc sbd sbl sbp sbs sca scb scc scd scl scp scs sda sdb sdc sdd sdl sdp sds sla slb slc sld sll slp sls spa spb spc spd spl spp sps ss- ssa ssb ssc ssd ssl ssp sss