pongs opngs pnogs npogs onpgs nopgs pogns opgns pgons gpons ogpns gopns pngos npgos pgnos gpnos ngpos gnpos ongps nogps ognps gonps ngops gnops ponsg opnsg pnosg nposg onpsg nopsg posng opsng psong spong ospng sopng pnsog npsog psnog spnog nspog snpog onspg nospg osnpg sonpg nsopg snopg pogsn opgsn pgosn gposn ogpsn gopsn posgn opsgn psogn spogn ospgn sopgn pgson gpson psgon spgon gspon sgpon ogspn gospn osgpn sogpn gsopn sgopn pngso npgso pgnso gpnso ngpso gnpso pnsgo npsgo psngo spngo nspgo snpgo pgsno gpsno psgno spgno gspno sgpno ngspo gnspo nsgpo sngpo gsnpo sgnpo ongsp nogsp ognsp gonsp ngosp gnosp onsgp nosgp osngp songp nsogp snogp ogsnp gosnp osgnp sognp gsonp sgonp ngsop gnsop nsgop sngop gsnop sgnop
Note: these 'words' (valid or invalid) are all the permutations of the word pongs. These words are obtained by scrambling the letters in pongs.