quibs uqibs qiubs iqubs uiqbs iuqbs qubis uqbis qbuis bquis ubqis buqis qibus iqbus qbius bqius ibqus biqus uibqs iubqs ubiqs buiqs ibuqs biuqs quisb uqisb qiusb iqusb uiqsb iuqsb qusib uqsib qsuib squib usqib suqib qisub iqsub qsiub sqiub isqub siqub uisqb iusqb usiqb suiqb isuqb siuqb qubsi uqbsi qbusi bqusi ubqsi buqsi qusbi uqsbi qsubi squbi usqbi suqbi qbsui bqsui qsbui sqbui bsqui sbqui ubsqi busqi usbqi subqi bsuqi sbuqi qibsu iqbsu qbisu bqisu ibqsu biqsu qisbu iqsbu qsibu sqibu isqbu siqbu qbsiu bqsiu qsbiu sqbiu bsqiu sbqiu ibsqu bisqu isbqu sibqu bsiqu sbiqu uibsq iubsq ubisq buisq ibusq biusq uisbq iusbq usibq suibq isubq siubq ubsiq busiq usbiq subiq bsuiq sbuiq ibsuq bisuq isbuq sibuq bsiuq sbiuq
Note: these 'words' (valid or invalid) are all the permutations of the word quibs. These words are obtained by scrambling the letters in quibs.