# import sys; input = sys.stdin.buffer.readline
# sys.setrecursionlimit(10**7)
from collections import defaultdict
con = 10 ** 9 + 7; INF = float("inf")

def getlist():
	return list(map(int, input().split()))

#処理内容
def main():
	X = 0; Y = 0
	S = input()
	for i in S:
		if i == "N":
			Y += 1
		elif i == "S":
			Y -= 1
		elif i == "E":
			X += 1
		else:
			X -= 1

	ans = (X ** 2 + Y ** 2) ** 0.5
	print(ans)



if __name__ == '__main__':
	main()