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

pos = 0
drctn = 1
targets = [1, 1j, -1, -1j]
target_str = "ENWS"

for cmd, num in lines:
    if cmd in target_str:
        pos += targets[target_str.index(cmd)] * num
    elif cmd in "LR":
        times = (-1 if cmd == "R" else 1) * num / 90
        drctn = drctn * 1j ** times
    else:
        pos += drctn * num

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