a-ak a-ha aaaa aaac aaaf aaah aaca aacc aacf aach aack aafa aafc aaff aaha aahk aaka acaa acac acca accc accf acch acfc acha achh afaa afak afca afcc afch affa affc afka ahac ahah ahfa ahha akaa akah akca akha akka caaa caac caaf caah cac- caca cacc cach cack cafa cafc caff caha caka ccaa ccac ccaf ccca cccc cccf ccfa ccfc ccff ccha cfaa cfac cfca cfcf cfhk chaa chac chaf chah chak chca chch chfa chfc chha chka ckac ckch ckck f--k faaa faac faah faca facc fach fack fafa fafc faff faha fakh fcca fccf fcch ffcc ffff haaf haak hack haff haha haka hakk hcca hccc hcch hcfa hcfc hhaa hhhh hkcc hkfa kaaa kaaf kaak kacc kach kafa kafc kaff kaha kahc kaka kakc kakh kakk kcaa kcac kcah kcca kccc kcck kcfa kcfc kcfh kcha kchf kchh kchk kckc kckf kckk kfac kfcf kfch kffa kfff kffk kfhc kfka khac khaf khak khca khcc khcf khch khck khhk khka khkk kkaa kkac kkch kkck kkha kkhh kkhk kkkk