which hwich wihch iwhch hiwch ihwch whcih hwcih wchih cwhih hcwih chwih wichh iwchh wcihh cwihh icwhh ciwhh hicwh ihcwh hciwh chiwh ichwh cihwh whihc hwihc wihhc iwhhc hiwhc ihwhc whhic hwhic whhic hwhic hhwic hhwic wihhc iwhhc whihc hwihc ihwhc hiwhc hihwc ihhwc hhiwc hhiwc ihhwc hihwc whchi hwchi wchhi cwhhi hcwhi chwhi whhci hwhci whhci hwhci hhwci hhwci wchhi cwhhi whchi hwchi chwhi hcwhi hchwi chhwi hhcwi hhcwi chhwi hchwi wichh iwchh wcihh cwihh icwhh ciwhh wihch iwhch which hwich ihwch hiwch wchih cwhih whcih hwcih chwih hcwih ichwh cihwh ihcwh hicwh chiwh hciwh hichw ihchw hcihw chihw ichhw cihhw hihcw ihhcw hhicw hhicw ihhcw hihcw hchiw chhiw hhciw hhciw chhiw hchiw ichhw cihhw ihchw hichw chihw hcihw
Note: these 'words' (valid or invalid) are all the permutations of the word which. These words are obtained by scrambling the letters in which.