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League of Legends is a famous game where two teams of 5 players each control their own heroes and engage in battles with the objective of destroying the enemy base.
However, many battles can reach a point where it becomes apparent halfway through that one team is on the brink of defeat. Therefore, it has a surrender mechanism.
Specifically, when a member of a team initiates a surrender vote, each member of the team can vote either for or against it. If the number of votes in favor is 4 or more, the surrender is considered successful; otherwise, it fails.
Here is an example of a successful surrender. Even there is a player not voting, the result is able to be declared as successful.
However, often the outcome of the surrender vote can be determined before all team members have voted. You are given the current state of votes, represented as a string $S$ of length 5, where each character can be $\texttt{Y}$ (for a vote in favor), $\texttt{N}$ (for a vote against), or $\texttt{-}$ (indicating no vote yet). The string $S$ satisfies the following constraints:
- The first character is $\texttt{Y}$, indicating the initiator of the surrender vote has voted in favor.
- There exists an index $1\le i\le 5$ such that for all indices $1\le j \le i$, $S[j] \in \{\texttt{Y}, \texttt{N}\}$, and for all indices $j > i$, $S[j] = \texttt{-}$.
Your task is to determine if the final outcome of the surrender vote can be determined based on the given state $S$. If it can be determined, output:
- 1 if the surrender is successful,
- \-1 if the surrender fails.
If it cannot be determined based on the given state $S$, output 0.
A string $S$ of length 5 consisting only of characters $\texttt{Y}$, $\texttt{N}$, and $\texttt{-}$.
If the result is determined, print $1$ if the vote succeeds and $-1$ otherwise. If the result is not determined and is based on the votes of some players, print $0$.
Sample#2:
In the input $\texttt{YNNY-}$, at most three members will vote yes in the final result. Therefore, the outcome is negative.