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}
forward = {"F": 1}

for cmd, num in lines:
    direction += targets.get(cmd, 0) * num
    times = angles.get(cmd, 0) * num / 90
    direction = direction * 1j ** times
    pos += forward.get(cmd, 0) * direction * num

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