def zen(s):
    if s=="E":ss=0
    elif s=="S":ss=1
    elif s=="W":ss=2
    elif s=="N":ss=3
    return ss
def kei(ss,nn):
    return (nn-ss)%4

def main():
    s=input()
    t=input()
    print(kei(zen(s),zen(t)))

main()