afrib farib arfib rafib fraib rfaib afirb fairb aifrb iafrb fiarb ifarb arifb raifb airfb iarfb riafb irafb friab rfiab firab ifrab rifab irfab afrbi farbi arfbi rafbi frabi rfabi afbri fabri abfri bafri fbari bfari arbfi rabfi abrfi barfi rbafi brafi frbai rfbai fbrai bfrai rbfai brfai afibr faibr aifbr iafbr fiabr ifabr afbir fabir abfir bafir fbair bfair aibfr iabfr abifr baifr ibafr biafr fibar ifbar fbiar bfiar ibfar bifar aribf raibf airbf iarbf riabf irabf arbif rabif abrif barif rbaif braif aibrf iabrf abirf bairf ibarf biarf ribaf irbaf rbiaf briaf ibraf biraf friba rfiba firba ifrba rifba irfba frbia rfbia fbria bfria rbfia brfia fibra ifbra fbira bfira ibfra bifra ribfa irbfa rbifa brifa ibrfa birfa
Note: these 'words' (valid or invalid) are all the permutations of the word afrib. These words are obtained by scrambling the letters in afrib.