lunch ulnch lnuch nluch unlch nulch lucnh ulcnh lcunh clunh uclnh culnh lncuh nlcuh lcnuh clnuh ncluh cnluh unclh nuclh ucnlh cunlh nculh cnulh lunhc ulnhc lnuhc nluhc unlhc nulhc luhnc ulhnc lhunc hlunc uhlnc hulnc lnhuc nlhuc lhnuc hlnuc nhluc hnluc unhlc nuhlc uhnlc hunlc nhulc hnulc luchn ulchn lcuhn cluhn uclhn culhn luhcn ulhcn lhucn hlucn uhlcn hulcn lchun clhun lhcun hlcun chlun hclun uchln cuhln uhcln hucln chuln hculn lnchu nlchu lcnhu clnhu nclhu cnlhu lnhcu nlhcu lhncu hlncu nhlcu hnlcu lchnu clhnu lhcnu hlcnu chlnu hclnu nchlu cnhlu nhclu hnclu chnlu hcnlu unchl nuchl ucnhl cunhl ncuhl cnuhl unhcl nuhcl uhncl huncl nhucl hnucl uchnl cuhnl uhcnl hucnl chunl hcunl nchul cnhul nhcul hncul chnul hcnul
Note: these 'words' (valid or invalid) are all the permutations of the word lunch. These words are obtained by scrambling the letters in lunch.