import numpy as np

S = input()
Y = 0
T = 0
for i in S:
    if i == "N":
        T += 1
    elif i == "E":
        Y += 1
    elif i == "W":
        Y -= 1
    elif i == "S":
        T -= 1

ans = np.sqrt(abs(Y)**2 + abs(T)**2)
print(ans)