AT_abc391_a [ABC391A] Lucky Direction

You are given a string $ D $ representing one of the eight directions (north, east, west, south, northeast, northwest, southeast, southwest). The correspondence between the directions and their representing strings is as follows. - North: `N` - East: `E` - West: `W` - South: `S` - Northeast: `NE` - Northwest: `NW` - Southeast: `SE` - Southwest: `SW` Print the string representing the direction opposite to the direction denoted by $ D $ .

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

Print the answer.

### Sample Explanation 1 Print `S`, which represents south, the direction opposite to north. ### Sample Explanation 2 Print `NW`, which represents northwest, the direction opposite to southeast. ### Constraints - $ D $ is one of `N`, `E`, `W`, `S`, `NE`, `NW`, `SE`, `SW`.