# -*- coding: utf-8 -*-

S = input()

x = y = 0
for c in S:
    if c == 'N':
        y += 1
    elif c == 'E':
        x += 1
    elif c == 'W':
        x -= 1
    else:
        y -= 1

print(pow(x**2+y**2, 0.5))