beceu ebceu bceeu cbeeu ecbeu cebeu beecu ebecu beecu ebecu eebcu eebcu bceeu cbeeu beceu ebceu cebeu ecbeu ecebu ceebu eecbu eecbu ceebu ecebu becue ebcue bceue cbeue ecbue cebue beuce ebuce buece ubece eubce uebce bcuee cbuee bucee ubcee cubee ucbee ecube ceube eucbe uecbe cuebe ucebe beeuc ebeuc beeuc ebeuc eebuc eebuc beuec ebuec bueec ubeec eubec uebec beuec ebuec bueec ubeec eubec uebec eeubc eeubc euebc ueebc euebc ueebc bceue cbeue becue ebcue cebue ecbue bcuee cbuee bucee ubcee cubee ucbee beuce ebuce buece ubece eubce uebce ceube ecube cuebe ucebe eucbe uecbe eceub ceeub eecub eecub ceeub eceub ecueb ceueb euceb ueceb cueeb uceeb eeucb eeucb euecb ueecb euecb ueecb ceueb ecueb cueeb uceeb euceb ueceb
Note: these 'words' (valid or invalid) are all the permutations of the word beceu. These words are obtained by scrambling the letters in beceu.