acurd caurd aucrd uacrd cuard ucard acrud carud arcud racud craud rcaud aurcd uarcd arucd raucd uracd ruacd curad ucrad cruad rcuad urcad rucad acudr caudr aucdr uacdr cuadr ucadr acdur cadur adcur dacur cdaur dcaur audcr uadcr aducr daucr udacr duacr cudar ucdar cduar dcuar udcar ducar acrdu cardu arcdu racdu cradu rcadu acdru cadru adcru dacru cdaru dcaru ardcu radcu adrcu darcu rdacu dracu crdau rcdau cdrau dcrau rdcau drcau aurdc uardc arudc raudc uradc ruadc audrc uadrc adurc daurc udarc duarc arduc raduc adruc daruc rdauc drauc urdac rudac udrac durac rduac druac curda ucrda cruda rcuda urcda rucda cudra ucdra cdura dcura udcra ducra crdua rcdua cdrua dcrua rdcua drcua urdca rudca udrca durca rduca druca
Note: these 'words' (valid or invalid) are all the permutations of the word acurd. These words are obtained by scrambling the letters in acurd.