Explain how can i find the letters in ?.

12. Ternary search tries. (5 points) Consider the following TST, where the integer values are shown next to the nodes of the cor- responding string keys. Each node labeled with a ? contains some uppercase letter (possibly different for each node). R 0 11 A 5 U R E 6 (E 7 8 E 1 (A ? 2 K 3 R 10 N E Which of the following string keys are (or could possibly be) in the TST? Mark all that apply. DATA BRIE DAD DARK DO FUN