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 C# (.NET Core 3.1.201) (judge verdict: Runtime Error)

using System;
using System.Diagnostics.Tracing;
using System.Linq;

namespace ConsoleApp4
{
    class Program
    {
        static void Main(string[] args)
        {
            string S = Console.ReadLine();
            string s = S[1].ToString();
            string ss = S[2].ToString();
            string sss = S[3].ToString();
            if (s == "S" && ss == "S" && sss == "S") { Console.WriteLine(0); }
            if (s == "S" && ss == "S" && sss == "R") { Console.WriteLine(1); }
            if (s == "S" && ss == "R" && sss == "S") { Console.WriteLine(1); }
            if (s == "R" && ss == "S" && sss == "S") { Console.WriteLine(1); }
            if (s == "R" && ss == "R" && sss == "S") { Console.WriteLine(2); }
            if (s == "R" && ss == "S" && sss == "R") { Console.WriteLine(1); }
            if (s == "S" && ss == "R" && sss == "R") { Console.WriteLine(2); }
            if (s == "R" && ss == "R" && sss == "R") { Console.WriteLine(3); }


        }
    }
}