cheba hceba cehba echba hecba ehcba chbea hcbea cbhea bchea hbcea bhcea cebha ecbha cbeha bceha ebcha becha hebca ehbca hbeca bheca ebhca behca cheab hceab cehab echab hecab ehcab chaeb hcaeb caheb acheb haceb ahceb ceahb ecahb caehb acehb eachb aechb heacb ehacb haecb ahecb eahcb aehcb chbae hcbae cbhae bchae hbcae bhcae chabe hcabe cahbe achbe hacbe ahcbe cbahe bcahe cabhe acbhe bache abche hbace bhace habce ahbce bahce abhce cebah ecbah cbeah bceah ebcah becah ceabh ecabh caebh acebh eacbh aecbh cbaeh bcaeh cabeh acbeh baceh abceh ebach beach eabch aebch baech abech hebac ehbac hbeac bheac ebhac behac heabc ehabc haebc ahebc eahbc aehbc hbaec bhaec habec ahbec bahec abhec ebahc beahc eabhc aebhc baehc abehc
Note: these 'words' (valid or invalid) are all the permutations of the word cheba. These words are obtained by scrambling the letters in cheba.