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)

t = input()
if (abs(len(t))<=3) and (t in 'S' or 'R'):
    if t[0]=='R' and t[1]=='R' and t[2]=='R':
        print(3)
    elif (t[0]=='R' and t[1]=='R' and t[2]!='R') or (t[0]!='R' and t[1]=='R' and t[2]=='R'):
        print(2)
    elif t[0]!='R' and t[1]!='R' and t[2]!='R':
        print(0)
    else:
        print(1)
else:
    print('false')