A = input()
B = input()

def f(x):
    if x == "E":
        return "W"
    if x == "W":
        return "S"
    if x == "S":
        return "N"
    if x == "N":
        return "E"

count = 0
while A != B:
    A = f(A)
    count += 1
print(count)