doydl odydl dyodl ydodl oyddl yoddl dodyl oddyl ddoyl ddoyl oddyl dodyl dydol yddol ddyol ddyol yddol dydol oyddl yoddl odydl doydl ydodl dyodl doyld odyld dyold ydold oydld yodld dolyd odlyd dloyd ldoyd oldyd lodyd dylod ydlod dlyod ldyod yldod lydod oyldd yoldd olydd loydd ylodd lyodd dodly oddly ddoly ddoly oddly dodly doldy odldy dlody ldody olddy loddy ddloy ddloy dldoy lddoy dldoy lddoy odldy doldy olddy loddy dlody ldody dydlo yddlo ddylo ddylo yddlo dydlo dyldo ydldo dlydo ldydo ylddo lyddo ddlyo ddlyo dldyo lddyo dldyo lddyo ydldo dyldo ylddo lyddo dlydo ldydo oydld yodld odyld doyld ydold dyold oyldd yoldd olydd loydd ylodd lyodd odlyd dolyd oldyd lodyd dloyd ldoyd ydlod dylod yldod lydod dlyod ldyod
Note: these 'words' (valid or invalid) are all the permutations of the word doydl. These words are obtained by scrambling the letters in doydl.