ribibe irbibe rbiibe briibe ibribe biribe riibbe iribbe riibbe iribbe iirbbe iirbbe rbiibe briibe ribibe irbibe biribe ibribe ibirbe biirbe iibrbe iibrbe biirbe ibirbe ribbie irbbie rbibie bribie ibrbie birbie ribbie irbbie rbibie bribie ibrbie birbie rbbiie brbiie rbbiie brbiie bbriie bbriie ibbrie bibrie ibbrie bibrie bbirie bbirie riibbe iribbe riibbe iribbe iirbbe iirbbe ribibe irbibe rbiibe briibe ibribe biribe ribibe irbibe rbiibe briibe ibribe biribe iibrbe iibrbe ibirbe biirbe ibirbe biirbe rbibie bribie ribbie irbbie birbie ibrbie rbbiie brbiie rbbiie brbiie bbriie bbriie ribbie irbbie rbibie bribie ibrbie birbie bibrie ibbrie bbirie bbirie ibbrie bibrie ibibre biibre iibbre iibbre biibre ibibre ibbire bibire ibbire bibire bbiire bbiire iibbre iibbre ibibre biibre ibibre biibre bibire ibbire bbiire bbiire ibbire bibire ribieb irbieb rbiieb briieb ibrieb birieb riibeb iribeb riibeb iribeb iirbeb iirbeb rbiieb briieb ribieb irbieb birieb ibrieb ibireb biireb iibreb iibreb biireb ibireb ribeib irbeib rbieib brieib ibreib bireib riebib irebib reibib eribib ierbib eirbib rbeiib breiib rebiib erbiib beriib ebriib iberib bierib iebrib eibrib beirib ebirib riiebb iriebb riiebb iriebb iirebb iirebb rieibb ireibb reiibb eriibb ieribb eiribb rieibb ireibb reiibb eriibb ieribb eiribb iierbb iierbb ieirbb eiirbb ieirbb eiirbb rbieib brieib ribeib irbeib bireib ibreib rbeiib breiib rebiib erbiib beriib ebriib riebib irebib reibib eribib ierbib eirbib bierib iberib beirib ebirib iebrib eibrib ibierb biierb iiberb iiberb biierb ibierb ibeirb bieirb iebirb eibirb beiirb ebiirb iiebrb iiebrb ieibrb eiibrb ieibrb eiibrb bieirb ibeirb beiirb ebiirb iebirb eibirb ribbei irbbei rbibei bribei ibrbei birbei ribbei irbbei rbibei bribei ibrbei birbei rbbiei brbiei rbbiei brbiei bbriei bbriei ibbrei bibrei ibbrei bibrei bbirei bbirei ribebi irbebi rbiebi briebi ibrebi birebi riebbi irebbi reibbi eribbi ierbbi eirbbi rbeibi breibi rebibi erbibi beribi ebribi iberbi bierbi iebrbi eibrbi beirbi ebirbi ribebi irbebi rbiebi briebi ibrebi birebi riebbi irebbi reibbi eribbi ierbbi eirbbi rbeibi breibi rebibi erbibi beribi ebribi iberbi bierbi iebrbi eibrbi beirbi ebirbi rbbeii brbeii rbbeii brbeii bbreii bbreii rbebii brebii rebbii erbbii berbii ebrbii rbebii brebii rebbii erbbii berbii ebrbii bberii bberii bebrii ebbrii bebrii ebbrii ibberi biberi ibberi biberi bbieri bbieri ibebri biebri iebbri eibbri beibri ebibri ibebri biebri iebbri eibbri beibri ebibri bbeiri bbeiri bebiri ebbiri bebiri ebbiri riibeb iribeb riibeb iribeb iirbeb iirbeb ribieb irbieb rbiieb briieb ibrieb birieb ribieb irbieb rbiieb briieb ibrieb birieb iibreb iibreb ibireb biireb ibireb biireb riiebb iriebb riiebb iriebb iirebb iirebb rieibb ireibb reiibb eriibb ieribb eiribb rieibb ireibb reiibb eriibb ieribb eiribb iierbb iierbb ieirbb eiirbb ieirbb eiirbb ribeib irbeib rbieib brieib ibreib bireib riebib irebib reibib eribib ierbib eirbib rbeiib breiib rebiib erbiib beriib ebriib iberib bierib iebrib eibrib beirib ebirib ribeib irbeib rbieib brieib ibreib bireib riebib irebib reibib eribib ierbib eirbib rbeiib breiib rebiib erbiib beriib ebriib iberib bierib iebrib eibrib beirib ebirib iiberb iiberb ibierb biierb ibierb biierb iiebrb iiebrb ieibrb eiibrb ieibrb eiibrb ibeirb bieirb iebirb eibirb beiirb ebiirb ibeirb bieirb iebirb eibirb beiirb ebiirb rbibei bribei ribbei irbbei birbei ibrbei rbbiei brbiei rbbiei brbiei bbriei bbriei ribbei irbbei rbibei bribei ibrbei birbei bibrei ibbrei bbirei bbirei ibbrei bibrei rbiebi briebi ribebi irbebi birebi ibrebi rbeibi breibi rebibi erbibi beribi ebribi riebbi irebbi reibbi eribbi ierbbi eirbbi bierbi iberbi beirbi ebirbi iebrbi eibrbi rbbeii brbeii rbbeii brbeii bbreii bbreii rbebii brebii rebbii erbbii berbii ebrbii rbebii brebii rebbii erbbii berbii ebrbii bberii bberii bebrii ebbrii bebrii ebbrii ribebi irbebi rbiebi briebi ibrebi birebi riebbi irebbi reibbi eribbi ierbbi eirbbi rbeibi breibi rebibi erbibi beribi ebribi iberbi bierbi iebrbi eibrbi beirbi ebirbi biberi ibberi bbieri bbieri ibberi biberi biebri ibebri beibri ebibri iebbri eibbri bbeiri bbeiri bebiri ebbiri bebiri ebbiri ibebri biebri iebbri eibbri beibri ebibri ibiber biiber iibber iibber biiber ibiber ibbier bibier ibbier bibier bbiier bbiier iibber iibber ibiber biiber ibiber biiber bibier ibbier bbiier bbiier ibbier bibier ibiebr biiebr iibebr iibebr biiebr ibiebr ibeibr bieibr iebibr eibibr beiibr ebiibr iiebbr iiebbr ieibbr eiibbr ieibbr eiibbr bieibr ibeibr beiibr ebiibr iebibr eibibr ibbeir bibeir ibbeir bibeir bbieir bbieir ibebir biebir iebbir eibbir beibir ebibir ibebir biebir iebbir eibbir beibir ebibir bbeiir bbeiir bebiir ebbiir bebiir ebbiir iibebr iibebr ibiebr biiebr ibiebr biiebr iiebbr iiebbr ieibbr eiibbr ieibbr eiibbr ibeibr bieibr iebibr eibibr beiibr ebiibr ibeibr bieibr iebibr eibibr beiibr ebiibr bibeir ibbeir bbieir bbieir ibbeir bibeir biebir ibebir beibir ebibir iebbir eibbir bbeiir bbeiir bebiir ebbiir bebiir ebbiir ibebir biebir iebbir eibbir beibir ebibir
Note: these 'words' (valid or invalid) are all the permutations of the word ribibe. These words are obtained by scrambling the letters in ribibe.