import math

S = input()
lenS = len(S)
listS = [0 for i in range(lenS)]

for i in range(lenS):
    listS[i] = S[i]

x = 0
y = 0
for i in range(lenS):
    if listS[i] == "N":
        y += 1
    elif listS[i] == "E":
        x += 1
    elif listS[i] == "S":
        y -= 1
    elif listS[i] == "W":
        x -= 1

print(math.hypot(x, y))