a-a a-b a-c aaa aab aac aag aap aas aay ab- aba abb abc abg abp abs aby ac- aca acb acc acg acp acs acy ag- aga agb agc agg agp ags agy ap- apa apb apc apg app aps apy as- asa asb asc asg asp ass asy ay- aya ayc ayp ays b-p baa bab bac bag bap bas bay bba bbb bbc bbg bbp bbs bby bca bcb bcc bcg bcp bcs bcy bga bgb bgc bgg bgp bgs bpa bpb bpc bpg bpp bps bpy bsa bsb bsc bsg bsp bss bsy by- bya byc byg byp bys c-- caa cab cac cag cap cas cay cba cbb cbc cbg cbp cbs cby cca ccb ccc ccg ccp ccs cga cgb cgc cgg cgp cgs cgy cpa cpb cpc cpg cpp cps csa csb csc csg csp css csy cya cyb cyc cyg cyp cys g-p gaa gab gac gag gap gas gay gba gbc gbg gbp gbs gby gca gcb gcc gcg gcp gcs gga ggb ggc ggg ggp ggs gpa gpb gpc gpg gpp gps gsa gsb gsc gsg gsp gss gy- gya gyb gyp gys p-p paa pab pac pag pap pas pay pba pbb pbc pbg pbp pbs pby pca pcb pcc pcg pcp pcs pga pgb pgc pgg pgp pgs pgy ppa ppb ppc ppg ppp pps ps- psa psb psc psg psp pss psy py- pya pyb pyc pyg pys saa sab sac sag sap sas say sba sbb sbc sbg sbp sbs sby sca scb scc scg scp scs sga sgb sgc sgg sgp sgs spa spb spc spg spp sps spy ss- ssa ssb ssc ssg ssp sss sy- sya syb syc syg syp sys yaa yab yac yag yap yas yay ybc ybg ybp ybs yby yca ycc ycp ycs ycy yga ygc ypa ypg yps ysa ysb ysc ysg ysp yss ysy yyb yyc yyg yys yyy