-tree c-tec ccccc ccett cech ceche cecht ceere cerc- cerce cerec cerer ceret cerke cerre certe cette chech check cheek cheer cheet chehr chekc cheke chere chert chete cheth chett chher crece creek creer creke crete ctree cttee echte ecker ecthr eecke eeeee eetch eheke ehret ekker erech erect erere erkec erte erter erthe etche eteke etete ether etree etrek etter he-he heche hecht hecke hect- hecte heere heete hehte heker hekk- hekte herce herek herke herre herte herth hetch hetek heter hethe hette hheth hhhhh hkcee hrere hthrt htree kecer keche keech keere kehek kehte kekec kerch kerek keret kerre ketch ketek keter kethe kette kheer kheth kreek kreke krete recce recet reche recht recke rect- recte reece reech reere reerh reeth reher rehet rekke rere- reree reret retch retee reter rethe rette rhett rt-rk tecch teche teech teeth tehee teket tekke terce terek teret terre tert- tetch teter tethe tetr- tette thec- theck thect theek theer theke ther- there therk thete theth thre- three thret treck treer treet trere trete trett ttttt