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 JavaScript (Node.js 12.16.1) (judge verdict: Runtime Error)

process.stdin.resume();
process.stdin.setEncoding('utf8');

var lines = [];
var reader = require('readline').createInterface({
    input: process.stdin,
    output: process.stdout
});
reader.on('line', (line) => {
    lines.push(line);
});
reader.on('close', () => {
  var N = lines[0].split("");
  if(N[0]==="R"){
    if(N[1]==="R"){
      if(N[2]==="R"){
        console.log(3);
      }else{
        console.log(2);
      }
    }else{
      console.log(1);
    }
  }else{
    if(N[1]==="R"){
      if(N[2]==="R"){
        console.log(2);
      }else{
        console.log(1);
      }
    }else{
      if(N[2]==="R"){
        console.log(1);
      }else{
        console.log(0);
      }
    }      
});