Problem Statement

We have weather records at AtCoder Town for some consecutive three days. A string of length $3$, $S$, represents the records - if the $i$-th character is S, it means it was sunny on the $i$-th day; if that character is R, it means it was rainy on that day.

Find the maximum number of consecutive rainy days in this period.

Constraints

• $|S| = 3$
• Each character of $S$ is S or R.

Input

Input is given from Standard Input in the following format:

$S$

Output

Print the maximum number of consecutive rainy days in the period.

Sample Input 1

RRS

Sample Output 1

2

We had rain on the $1$-st and $2$-nd days in the period. Here, the maximum number of consecutive rainy days is $2$, so we should print $2$.

Sample Input 2

SSS

Sample Output 2

0

It was sunny throughout the period. We had no rainy days, so we should print $0$.

Sample Input 3

RSR

Sample Output 3

1

We had rain on the $1$-st and $3$-rd days - two "streaks" of one rainy day, so we should print $1$.