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.

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

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

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.