ceecee cerete cheche check- checkt cheech cheeke cheekh cheere chekkt cherch cheree cheret cherke cherre cherte chetek creche creech creeke creete creket crethe echeck eckert eerect erche- erkech erreth errett etcetc etcher ethere ethete hecche hecher hecker heehee heerce heeter hehehe hehheh hereke herher herter herthe hetche heter- hether hetter hkcccc k-tree kecche keeker kehrer kerche kerker kertch kertee kerteh kether ketter kreker kretek r-tree recche reeker reetch rehete retche retece retech reteer reteet retere rether retree retret retter t-tree te-hee tecche techch teehee teerth teetee teeter teethe tekkeh tercer tercet terete terrer terret terter tertre tetche tetete tethee tether tetteh tetter theche thekte thetch thetee thethe threet threte thrett tr-rec treche treck- treece treete trehet treker tretee trette