choir hcoir cohir ochir hocir ohcir chior hcior cihor ichor hicor ihcor coihr ocihr ciohr icohr oichr iochr hoicr ohicr hiocr ihocr oihcr iohcr chori hcori cohri ochri hocri ohcri chroi hcroi crhoi rchoi hrcoi rhcoi corhi ocrhi crohi rcohi orchi rochi horci ohrci hroci rhoci orhci rohci chiro hciro cihro ichro hicro ihcro chrio hcrio crhio rchio hrcio rhcio cirho icrho criho rciho ircho richo hirco ihrco hrico rhico irhco rihco coirh ocirh ciorh icorh oicrh iocrh corih ocrih croih rcoih orcih rocih ciroh icroh crioh rcioh ircoh ricoh oirch iorch orich roich iroch rioch hoirc ohirc hiorc ihorc oihrc iohrc horic ohric hroic rhoic orhic rohic hiroc ihroc hrioc rhioc irhoc rihoc oirhc iorhc orihc roihc irohc riohc
Note: these 'words' (valid or invalid) are all the permutations of the word choir. These words are obtained by scrambling the letters in choir.