tradc rtadc tardc atrdc ratdc artdc trdac rtdac tdrac dtrac rdtac drtac tadrc atdrc tdarc dtarc adtrc datrc radtc ardtc rdatc dratc adrtc dartc tracd rtacd tarcd atrcd ratcd artcd trcad rtcad tcrad ctrad rctad crtad tacrd atcrd tcard ctard actrd catrd ractd arctd rcatd cratd acrtd cartd trdca rtdca tdrca dtrca rdtca drtca trcda rtcda tcrda ctrda rctda crtda tdcra dtcra tcdra ctdra dctra cdtra rdcta drcta rcdta crdta dcrta cdrta tadcr atdcr tdacr dtacr adtcr datcr tacdr atcdr tcadr ctadr actdr catdr tdcar dtcar tcdar ctdar dctar cdtar adctr dactr acdtr cadtr dcatr cdatr radct ardct rdact dract adrct darct racdt arcdt rcadt cradt acrdt cardt rdcat drcat rcdat crdat dcrat cdrat adcrt dacrt acdrt cadrt dcart cdart
Note: these 'words' (valid or invalid) are all the permutations of the word tradc. These words are obtained by scrambling the letters in tradc.