# -*- coding:utf-8 -*-
import math

if __name__ == '__main__':
    d = {
        "N": (1, 0),
        "S": (-1, 0),
        "W": (0, -1),
        "E": (0, 1),
    }
    if __name__ == '__main__':
        sn = input()
        p = (0, 0)
        for s in sn:
            p = tuple(map(sum, zip(p, d[s])))
        print(math.hypot(*p))