# -*-coding: utf-8 -*-
x = 0
y = 0
n = 0
tr = True

clad_x = int(input())
clad_y = int(input())
storona = input()
kol = int(input())

while storona != 'стоп':
    if clad_x == x and clad_y == y:
        tr = False

    if storona == 'север':
        y += kol
        if tr:
            n += 1

    elif storona == 'запад':
        x -= kol
        if tr:
            n += 1

    elif storona == 'юг':
        y -= kol
        if tr:
            n += 1

    elif storona == 'восток':
        x += kol
        if tr:
            n += 1

    storona = input()
    if storona != 'стоп':
        kol = int(input())

print(n)