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 Python (3.8.2) (judge verdict: Accepted)

if __name__ == "__main__":
    S = input()
    list_s = [s for s in S]
    ans = 0
    if list_s[0] == 'S' and list_s[1] == 'S' and list_s[2] == 'S':
        ans = 0
    elif list_s[0] == 'S' and list_s[1] == 'S' and list_s[2] == 'R':
        ans = 1
    elif list_s[0] == 'S' and list_s[1] == 'R' and list_s[2] == 'R':
        ans = 2
    elif list_s[0] == 'R' and list_s[1] == 'R' and list_s[2] == 'R':
        ans = 3
    elif list_s[0] == 'R' and list_s[1] == 'S' and list_s[2] == 'R':
        ans = 1
    elif list_s[0] == 'R' and list_s[1] == 'R' and list_s[2] == 'S':
        ans = 2
    elif list_s[0] == 'R' and list_s[1] == 'S' and list_s[2] == 'S':
        ans = 1
    elif list_s[0] == 'S' and list_s[1] == 'R' and list_s[2] == 'S':
        ans = 1

    print(ans)