singe isnge snige nsige insge nisge signe isgne sgine gsine igsne gisne sngie nsgie sgnie gsnie ngsie gnsie ingse nigse ignse ginse ngise gnise sineg isneg snieg nsieg inseg niseg sieng iseng seing esing iesng eisng sneig nseig senig esnig nesig ensig inesg niesg iensg einsg neisg enisg sigen isgen sgien gsien igsen gisen siegn isegn seign esign iesgn eisgn sgein gsein segin esgin gesin egsin igesn giesn iegsn eigsn geisn egisn sngei nsgei sgnei gsnei ngsei gnsei snegi nsegi sengi esngi nesgi ensgi sgeni gseni segni esgni gesni egsni ngesi gnesi negsi engsi gensi egnsi inges niges ignes gines ngies gnies inegs niegs iengs eings neigs enigs igens giens iegns eigns geins egins ngeis gneis negis engis genis egnis
Note: these 'words' (valid or invalid) are all the permutations of the word singe. These words are obtained by scrambling the letters in singe.