tubas utbas tbuas btuas ubtas butas tuabs utabs taubs atubs uatbs autbs tbaus btaus tabus atbus batus abtus ubats buats uabts aubts bauts abuts tubsa utbsa tbusa btusa ubtsa butsa tusba utsba tsuba stuba ustba sutba tbsua btsua tsbua stbua bstua sbtua ubsta busta usbta subta bsuta sbuta tuasb utasb tausb atusb uatsb autsb tusab utsab tsuab stuab ustab sutab tasub atsub tsaub staub astub satub uastb austb usatb suatb asutb sautb tbasu btasu tabsu atbsu batsu abtsu tbsau btsau tsbau stbau bstau sbtau tasbu atsbu tsabu stabu astbu satbu bastu abstu bsatu sbatu asbtu sabtu ubast buast uabst aubst baust abust ubsat busat usbat subat bsuat sbuat uasbt ausbt usabt suabt asubt saubt basut absut bsaut sbaut asbut sabut
Note: these 'words' (valid or invalid) are all the permutations of the word tubas. These words are obtained by scrambling the letters in tubas.