SUPERFLUIDS

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def del die dif dip dis due dui dup eds efs eld elf els ers ess fed fer fes feu fid fie fil fir flu fud fur ids ifs ire led lei les leu lid lie lip lis ped per pes pie pis piu psi pud pul pur pus red ref rei rep res rid rif rip rue sei sel ser sip sir sis sri sue sup ulu ups urd urp use

defi deil delf deli dels diel dies difs dips dire dirl diss drip duel dues dupe dups dure elds feds fess feud feus fids file fils fire firs fled flip flir flue flus fuds fuel furl furs fuse fuss ides idle ired ires isle leis less leud lids lied lief lier lies lieu life lipe lips lire lisp lude lues lure peds pelf peri pfui pied pier pies pile piss pled plie plus psis puds pule puli puls pure puri purl purs puss reds refs reif reis reps ride rids riel rife rifs rile ripe rips rise rude rued rues rule ruse seif seis self sels serf sers side sild sipe sips sire sirs sled slid slip slue slur sped spud spue spur sris suds sued suer sues sulu supe sups surd sure surf ulus urds urps urus used user uses