p02582 AtCoder Beginner Contest 175 - Rainy Season
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.

Examples

Input

RRS


Output

2


Input

SSS


Output

0


Input

RSR


Output

1
```python
s=input()
c=0
r=0
for i in s:
  if i!='R':
    c=0
  else:
    c+=1
    r=max(r,c)
print(r)
  
```