mmmm mmms mmst mmsu mmts mmus mmyy mrtm mrts mrtt msmm msms msmu msrt mssm mssr msst mstr msts msus mtrr mtss mtst mttr mtts mumm mums mumu mumy murr murs murt muru mury muss must musu muts mutt mutu muut muys mymy myrr myrt myry mys- myss myst myus myys rmst rmtu rrrr rrum rsts rstu rsum rtms rtss rtts rumm rums rumt rumy rurs ruru russ rust rusu rusy ruts rutt rutu ruty ruys rysy rytt ryyt smrt smry smss smtu smty smur smus smut srtr ssrm ssrs sssm ssss ssts stms stmt strs stru stry stsm stss sttr stum stur stus stut stuy styr stys sum- sums sumu sumy sur- surr surs surt suru sury sus- suss sust susu susy sutu suty suum suus suyr suyu sym- syms syrs syrt syry syss syst sytt tmtt trms trmu trst trtr trus trut truu try- trym trys tssm tssr tsst tstm tsts tsum tsys ttms ttss tttt ttys tums tumu turm turr turs turt turu tury tusm tuss tust tuts tutt tutu tuty tuum tuys tyr- tyrr tyss tyst tytt tyty tyus umms umsu umts umus umut urry urss ursu ursy urts urum urur urus urut usmm usms ussr usss usst ussu ussy ustm usts usus uttu uuuu uyts ymts ymur yssu yurt yury yust yutu yuty yuyu yyyy