import math

s = list(input())
n = 0
m = 0
for i in range(len(s)):
    if s[i] == 'N':
        n += 1
    elif s[i] == 'E':
        m += 1
    elif s[i] == 'W':
        m -= 1
    else:
        n -= 1

a = n ** 2 + m ** 2
print(math.sqrt(a))