a-a aaa aad aaf aam aas ad- ada add adf adm ads af- afa afd aff afm afs ama amd amf amm ams as- asa asd asf asm ass daa dad daf dam das dda ddd ddf ddm dds dfa dfd dff dfm dfs dma dmd dmf dmm dms dsa dsd dsf dsm dss faa fad faf fam fas fda fdd fdf fdm fds ffa ffd fff ffm ffs fma fmd fmf fmm fms fsa fsd fsf fsm fss m-f maa mad maf mam mas mda mdd mdf mdm mds mfa mfd mff mfm mfs mma mmd mmf mmm mms msa msd msf msm mss saa sad saf sam sas sda sdd sdf sdm sds sfa sfd sff sfm sfs sma smd smf smm sms ss- ssa ssd ssf ssm sss