Unscramble DTSFIR

drifts

dirts distr drift first frist frits rifts strid

difs dirt dist dits dsri fids firs fist fits fris frit rids rifs rift rist rits sift sirt stid stir tids trid

dft dif dir dis dit dsr fid fir fit frs frt ids ifs irs ist itd its rfs rid rif ris rit rti sif sir sit sri std str tdr tfr tid tis trf tri trs tsi

di dr ds dt fi fr fs ft id if ir is it rd rf rs rt sd sf si sr st ti tr ts