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

s = list(input())
gn, ge, gw, gs = 0, 0, 0, 0
for i in range(len(s)):
    if s[i] == "N":
        gn += 1
    if s[i] == "E":
        ge += 1
    if s[i] == "W":
        gw += 1
    if s[i] == "S":
        gs += 1

width = abs(ge - gw)
height = abs(gn - gs)

print((width ** 2 + height ** 2) ** 0.5)