import sys
read = sys.stdin.buffer.read
readline = sys.stdin.buffer.readline
readlines = sys.stdin.buffer.readlines

S = read().rstrip().decode('utf-8')

move = {'E':(1,0), 'W': (-1,0), 'S': (0,-1), 'N': (0,1)}

x,y = 0,0
for s in S:
    dx,dy = move[s]
    x += dx; y += dy

answer = (x * x + y * y) ** .5
print(answer)