Permutations For BIRST

Here are all the permutations for the letters BIRST.

birst birts bisrt bistr bitrs bitsr brist brits brsit brsti brtis brtsi bsirt bsitr bsrit bsrti bstir bstri btirs btisr btris btrsi btsir btsri ibrst ibrts ibsrt ibstr ibtrs ibtsr irbst irbts irsbt irstb irtbs irtsb isbrt isbtr isrbt isrtb istbr istrb itbrs itbsr itrbs itrsb itsbr itsrb rbist rbits rbsit rbsti rbtis rbtsi ribst ribts risbt ristb ritbs ritsb rsbit rsbti rsibt rsitb rstbi rstib rtbis rtbsi rtibs rtisb rtsbi rtsib sbirt sbitr sbrit sbrti sbtir sbtri sibrt sibtr sirbt sirtb sitbr sitrb srbit srbti sribt sritb srtbi srtib stbir stbri stibr stirb strbi strib tbirs tbisr tbris tbrsi tbsir tbsri tibrs tibsr tirbs tirsb tisbr tisrb trbis trbsi tribs trisb trsbi trsib tsbir tsbri tsibr tsirb tsrbi tsrib