a-a a-b a-c aaa aab aac aam aap aas ab- aba abb abc abm abp abs ac- aca acb acc acm acp acs ama amb amc amm amp ams ap- apa apb apc apm app aps as- asa asb asc asm asp ass b-p baa bab bac bam bap bas bba bbb bbc bbm bbp bbs bca bcb bcc bcm bcp bcs bma bmb bmc bmm bmp bms bpa bpb bpc bpm bpp bps bsa bsb bsc bsm bsp bss c-- caa cab cac cam cap cas cba cbb cbc cbm cbp cbs cca ccb ccc ccm ccp ccs cma cmb cmc cmm cmp cms cpa cpb cpc cpm cpp cps csa csb csc csm csp css maa mab mac mam map mas mba mbb mbc mbm mbp mbs mc- mca mcb mcc mcm mcp mcs mma mmb mmc mmm mmp mms mpa mpb mpc mpm mpp mps msa msb msc msm msp mss p-p paa pab pac pam pap pas pba pbb pbc pbm pbp pbs pca pcb pcc pcm pcp pcs pma pmb pmc pmm pmp pms ppa ppb ppc ppm ppp pps ps- psa psb psc psm psp pss saa sab sac sam sap sas sba sbb sbc sbm sbp sbs sca scb scc scm scp scs sma smb smc smm smp sms spa spb spc spm spp sps ss- ssa ssb ssc ssm ssp sss