f--k ffff ffun fluf fnuf fuff fufu fugu fukk fuku fulk full fulu funf fung funk ggfg gggg glug glun guff gugg gugu gulf gull gulu gung gunk gunn kfff kffg kffk kffn kflf kflg kfll kfln kfnf kfnk kfnl kfnn kful kfun kgff kgfk kgfl kggf kggg kggl kgkl kglk kgln kgng kgnu kkfg kkfn kkgl kkkk kklf kkll kkln kknn kknu kkuu klff klfg klfn klgl klgn klgu klkk klkl klkn kllk klng klnn kluf klug kluk klun kluu knfl kngl kngn knkk knlf knng knnk knuk kuff kufn kugn kukk kukl kukn kuku kulf kull kuln kulu kung kunk kunu kuuk kuul kuuu lfng lgfl llll lnnk luff lufu lugg lugu lull lulu lung lunk lunn luuk nfff nguu nlgn nngn nnnn nuff nuku null nung nunk nunn nuuk ufuk uguu uluk ulul ungu unkl unkn unlf uulu uuuu