Problem:
Score : 100 points

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.

Solution in Java (OpenJDK 11.0.6) (judge verdict: Runtime Error)

import java.util.*;
public class Main {
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
 
        String a = sc.next();
        String b = sc.next();
        String c = sc.next();
 
		int n;
        n=0;
        
        if(a.equals("S")&&b.equals("S")&&c.equals("S")){
        	n=0;
        }
      
        if(a.equals("S")&&b.equals("S")&&c.equals("R")){
        	n=1;
        }
      
        if(a.equals("S")&&b.equals("R")&&c.equals("S")){
        	n=1;
        }        
      
        if(a.equals("R")&&b.equals("S")&&c.equals("S")){
        	n=1;
        }
      
        if(a.equals("R")&&b.equals("R")&&c.equals("S")){
        	n=2;
        }
      
        if(a.equals("S")&&b.equals("R")&&c.equals("R")){
        	n=2;
        }
 
        if(a.equals("R")&&b.equals("R")&&c.equals("R")){
        	n=3;
        }
      
        if(a.equals("R")&&b.equals("S")&&c.equals("R")){
        	n=1;
        }
      

// 出力
        System.out.println(n);
    }
}