tubar utbar tbuar btuar ubtar butar tuabr utabr taubr atubr uatbr autbr tbaur btaur tabur atbur batur abtur ubatr buatr uabtr aubtr bautr abutr tubra utbra tbura btura ubtra butra turba utrba truba rtuba urtba rutba tbrua btrua trbua rtbua brtua rbtua ubrta burta urbta rubta bruta rbuta tuarb utarb taurb aturb uatrb autrb turab utrab truab rtuab urtab rutab tarub atrub traub rtaub artub ratub uartb aurtb uratb ruatb arutb rautb tbaru btaru tabru atbru batru abtru tbrau btrau trbau rtbau brtau rbtau tarbu atrbu trabu rtabu artbu ratbu bartu abrtu bratu rbatu arbtu rabtu ubart buart uabrt aubrt baurt aburt ubrat burat urbat rubat bruat rbuat uarbt aurbt urabt ruabt arubt raubt barut abrut braut rbaut arbut rabut
Note: these 'words' (valid or invalid) are all the permutations of the word tubar. These words are obtained by scrambling the letters in tubar.