import math
M = list(map(str, input()))
N = M.count("N")
S = M.count("S")
E = M.count("E")
W = M.count("W")
SUM = (N - S) ** 2 + (E - W) ** 2
ans = math.sqrt(SUM)
ans = str(ans) + "0"
if ans.find(".00") == 1:
    ans = float(ans)
    print(math.ceil(ans))
else:
    ans = float(ans)
    print("{:.5f}".format(ans))