#!/usr/bin/python
from collections import Counter
dic = {
    'N': (0, 1),
    'E': (1, 0),
    'W': (-1, 0),
    'S': (0, -1),
}

S = raw_input()
counter = Counter(S)
x, y = map(sum, zip(*map(lambda (k, v): dic[k]*v, counter.items())))
print (x*x + y*y) ** .5