buses ubses bsues sbues usbes subes buess ubess beuss ebuss uebss eubss bseus sbeus besus ebsus sebus esbus usebs suebs uesbs eusbs seubs esubs busse ubsse bsuse sbuse usbse subse busse ubsse bsuse sbuse usbse subse bssue sbsue bssue sbsue ssbue ssbue ussbe susbe ussbe susbe ssube ssube buess ubess beuss ebuss uebss eubss buses ubses bsues sbues usbes subes besus ebsus bseus sbeus esbus sebus uesbs eusbs usebs suebs esubs seubs bsesu sbesu bessu ebssu sebsu esbsu bsseu sbseu bsseu sbseu ssbeu ssbeu bessu ebssu bsesu sbesu esbsu sebsu sesbu essbu ssebu ssebu essbu sesbu usesb suesb uessb eussb seusb esusb usseb suseb usseb suseb ssueb ssueb uessb eussb usesb suesb esusb seusb sesub essub sseub sseub essub sesub
Note: these 'words' (valid or invalid) are all the permutations of the word buses. These words are obtained by scrambling the letters in buses.