Make Bob Win

Alice and Bob are playing a game. They have with them a binary string $S$. Alice and Bob alternate making moves, with Alice going first. On their turn, a player does the following: - Choose a non-empty contiguous [substring](https://en.wikipedia.org/wiki/Substring) of $S$ all of whose characters are the same, delete it from $S$, and concatenate the remaining parts. - More formally, choose i