lines = ((x[0], int(x[1:].strip())) for x in open("input.txt"))

pos = 0
direction = 10 + 1j
targets = {"E": 1, "N": 1j, "W": -1, "S": -1j}
angles = {"L": 1, "R": -1}

for cmd, num in lines:
    if cmd in targets:
        direction += targets[cmd] * num
    elif cmd in angles:
        times = angles[cmd] * num / 90
        direction = direction * 1j ** times
    else:
        pos += direction * num

print(int(abs(pos.real) + abs(pos.imag)))