A - A Healthy Breakfast /

問題文

ご飯の皿が味噌汁の皿より左にあるかどうかを判定してください。

制約

• |S| = 3
• S には R M S1 文字ずつ含まれる

入力

S


出力

ご飯の皿が味噌汁の皿より左にあれば Yes 、そうでなければ No を出力してください。

入力例 1

RSM


出力例 1

Yes


ご飯の皿は左から 1 番目にあり、味噌汁の皿は左から 3 番目にあります。ご飯の皿の方が左にあるので、 Yes を出力します。

入力例 2

SMR


出力例 2

No


Score : 100 points

Problem Statement

Takahashi eats three plates for breakfast: rice, miso soup, and salad.

His table is long and narrow, so he arranged the three plates in a row. The arrangement is given by a string S, where the i-th plate from the left is rice if S_i is R, miso soup if S_i is M, and salad if S_i is S.

Determine whether the plate of rice is to the left of the plate of miso soup.

Constraints

• |S| = 3
• S contains one R, one M, and one S.

Input

The input is given from Standard Input in the following format:

S


Output

Print Yes if the plate of rice is to the left of the plate of miso soup, and No otherwise.

Sample Input 1

RSM


Sample Output 1

Yes


The plate of rice is at the 1st position from the left, and the plate of miso soup is at the 3rd position from the left. Since the plate of rice is to the left, print Yes.

Sample Input 2

SMR


Sample Output 2

No


The plates are arranged as salad, miso soup, and rice from left to right.