Problem Statement

The color of a certain traffic light changes periodically in the order B (blue), Y (yellow), R (red), B (blue), Y (yellow), R (red), $\dots$.

You are given a character $c$ representing the current color of the traffic light. Output the next color of the traffic light.

Constraints

• $c$ is one of B, Y, and R.

Input

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

• $c$

Output

Output the character representing the next color of the traffic light.

B

Y

The color after B (blue) is Y (yellow). Thus, output Y.

R

B

The color after red is blue.

Y

R

• Source: AtCoder ABC 477 A