ffff ffrr ffss fftf fmsr fmss fnrs frmn frns frsm frst fssf ftrs ftsr mfrs mftf mmff mmmm mmms mmrf mmst mmts mntn mrtm mrtn mrts mrtt msff msfs msft msmm msms msrt mssf mssm mssr msst mstr msts mtff mtns mtnt mtrr mtss mtst mttr mtts nfff nfrs nfsm nfsr nmff nmfs nmnt nnmt nnnn nnss nntn nrts nsfs nsnr nssf nssr nsss nsts ntfs ntsf ntss nttm nttr rmst rnnt rrrr rsnn rsnr rsts rtfm rtms rtns rtss rtts sfmm sfnt sfss sfts smrf smrt smsn smss smtn snns snrs sntr srnn srtr ssns ssrm ssrs sssf sssm ssss ssts stfn stms stmt stnn stnr stns strn strs stsf stsm stss sttr tfrs tfss tmnt tmtt tnts trfm trfr trms trst trtr tsfm tssf tssm tssr tsst tstm tsts ttff ttfn ttms ttss tttt