#!/usr/bin/python
from collections import Counter
dic = {
    'N': (0, 1),
    'E': (1, 0),
    'W': (-1, 0),
    'S': (0, -1),
}
calc_distance = lambda (k, v): map(lambda v: v*counter[k], dic[k])

S = raw_input()
counter = Counter(S)
arr = map(calc_distance, counter.items())
x, y = map(sum, zip(*arr))
print (x*x + y*y) ** .5