Question 6
Pierre lives on island 1 and receives the code B−A−C−A−A−B. Each letter tells him which labelled bridge to cross to find treasure.

If the current island has no bridge with the requested letter, he skips that instruction. For example, starting at 1 with A−B−A, he first crosses to 2, skips B because no B bridge leaves 2, then crosses A back to 1. With the actual code, on which island is the treasure?

If the current island has no bridge with the requested letter, he skips that instruction. For example, starting at 1 with A−B−A, he first crosses to 2, skips B because no B bridge leaves 2, then crosses A back to 1. With the actual code, on which island is the treasure?