S = ["E","S","W","N"]
A = input()
B = input()
A_s = 90 * S.index(A)
B_s = 90 * S.index(B)
if A_s - B_s > 0:
    print(4 - abs(A_s-B_s)//90)
else:
    print((A_s-B_s)//90)