-tree b-r-k bbbee be-er bebek beber beebe beeke beete beker bekke berbe berek beret berk- berke berre berte betee beter betke betre bett- bette breek breer breet breke brere brett brrrr btr-t ebber ebbet ebert eeeee ekker erbbe erber erere erte erter eteke etete etree etrek etter k-t-b kebbe kebek keber keere kerek keret kerre ketek keter kette kreek kreke krete rebbe reber rebet reere rekke rere- reree reret retee reter rette rt-rk tbtbt teber tebet teket tekke terek teret terre tert- teter tetr- tette treer treet trere trete trett ttttt