kafir akfir kfair fkair afkir fakir kaifr akifr kiafr ikafr aikfr iakfr kfiar fkiar kifar ikfar fikar ifkar afikr faikr aifkr iafkr fiakr ifakr kafri akfri kfari fkari afkri fakri karfi akrfi krafi rkafi arkfi rakfi kfrai fkrai krfai rkfai frkai rfkai afrki farki arfki rafki fraki rfaki kairf akirf kiarf ikarf aikrf iakrf karif akrif kraif rkaif arkif rakif kiraf ikraf kriaf rkiaf irkaf rikaf airkf iarkf arikf raikf irakf riakf kfira fkira kifra ikfra fikra ifkra kfria fkria krfia rkfia frkia rfkia kirfa ikrfa krifa rkifa irkfa rikfa firka ifrka frika rfika irfka rifka afirk fairk aifrk iafrk fiark ifark afrik farik arfik rafik fraik rfaik airfk iarfk arifk raifk irafk riafk firak ifrak friak rfiak irfak rifak
Note: these 'words' (valid or invalid) are all the permutations of the word kafir. These words are obtained by scrambling the letters in kafir.