fff ffm ffr ffs fft ffu fmf fmm fmr fms fmt fmu frf frm frr frs frt fru fsf fsm fsr fss fst fsu ftf ftm ftr fts ftt ftu fuf fum fur fus fut fuu m-f m-r mff mfm mfr mfs mft mfu mmf mmm mmr mms mmt mmu mrf mrm mrr mrs mrt mru msf msm msr mss mst msu mtf mtm mtr mts mtt mtu muf mum mur mus mut muu rff rfm rfr rfs rft rfu rmf rmm rmr rms rmt rrf rrm rrr rrs rrt rru rsf rsm rsr rss rst rsu rtf rtm rtr rts rtt rtu ruf rum rur rus rut ruu sff sfm sfr sfs sft sfu smf smm smr sms smt smu sr- srf srm srr srs srt ss- ssf ssm ssr sss sst ssu stf stm str sts stt stu suf sum sur sus sut suu tff tfm tfr tfs tft tfu tmf tmm tmr tms tmt tmu trf trm trr trs trt tru tsf tsm tsr tss tst tsu ttf ttm ttr tts ttt ttu tuf tum tur tus tut tuu uff ufm ufr ufs uft ufu um- umf umm umr ums umt umu ur- urf urm urr urs urt uru usf usm usr uss ust usu utf utm utr uts utt utu uum uur uus uut uuu