How Far ?

You are walking from your house to a pond that is down your street. How many blocks over will you have to walk until you get to the pond?

Task

Evaluate how many blocks you will have to walk if you are given a representation of your street where H represents your house, P represents the pond, and every B represents a block in between the two.

Input Format

A string of letters representing your house, the pond, and blocks on your street.

Output Format

An integer value that represents the number of blocks between your house and the pond.

Sample Input

BBHBBBBPBBB 

Sample Output

4

Explanation

There are 4 blocks between your house and the pond on your street.

Solutions

Language	Solution
C	not available
CPP	not available
C#	not available
Python	available
Java	not available
Ruby	not available
Swift	not available