a-a aaa aaf aam aar aas aau af- afa aff afm afr afs afu ama amf amm amr ams amu ar- ara arf arm arr ars aru as- asa asf asm asr ass asu au- aua auf aum aur aus faa faf fam far fas fau ffa fff ffm ffr ffs ffu fma fmf fmm fmr fms fmu fra frf frm frr frs fru fsa fsf fsm fsr fss fsu fua fuf fum fur fus fuu m-f m-r maa maf mam mar mas mau mfa mff mfm mfr mfs mfu mma mmf mmm mmr mms mmu mra mrf mrm mrr mrs mru msa msf msm msr mss msu mua muf mum mur mus muu ra- raa raf ram rar ras rau rfa rff rfm rfr rfs rfu rma rmf rmm rmr rms rra rrf rrm rrr rrs rru rsa rsf rsm rsr rss rsu rua ruf rum rur rus ruu saa saf sam sar sas sau sfa sff sfm sfr sfs sfu sma smf smm smr sms smu sr- sra srf srm srr srs ss- ssa ssf ssm ssr sss ssu sua suf sum sur sus suu ua- uaa uaf uam uar uas uau ufa uff ufm ufr ufs ufu um- uma umf umm umr ums umu ur- ura urf urm urr urs uru usa usf usm usr uss usu uua uum uur uus uuu