a-a a-b aaa aab aad aam aap ab- aba abb abd abm abp ad- ada adb add adm adp ama amb amd amm amp ap- apa apb apd apm app b-p baa bab bad bam bap bba bbb bbd bbm bbp bda bdb bdd bdm bdp bma bmb bmd bmm bmp bpa bpb bpd bpm bpp daa dab dad dam dap dba dbb dbd dbm dbp dda ddb ddd ddm ddp dma dmb dmd dmm dmp dpa dpb dpd dpm dpp maa mab mad mam map mba mbb mbd mbm mbp mda mdb mdd mdm mdp mma mmb mmd mmm mmp mpa mpb mpd mpm mpp p-p paa pab pad pam pap pba pbb pbd pbm pbp pda pdb pdd pdm pdp pma pmb pmd pmm pmp ppa ppb ppd ppm ppp