file = [i.rstrip() for i in open("input").readlines()]
# create the light array
lights = [[0 for i in range(1000)] for j in range(1000)]

for i in file:
    offset = False
    splitted = i.split(" ")
    command = splitted[0]
    if splitted[1] in ["on", "off"]:
        command += splitted[1]
        offset = True

    if offset:
        c1 = splitted[2].split(',')
    else:
        c1 = splitted[1].split(',')

    if offset:
        c2 = splitted[4].split(',')
    else:
        c2 = splitted[3].split(',')

    print(c1, c2)
    x = int(c1[0])
    xc = int(c2[0])
    y = int(c1[1])
    yc = int(c2[1])
    print(command)

    for j in range(xc - x + 1):
        for k in range(yc - y + 1):
            pos = (x + j, y + k)
            if command == "turnon":
                lights[x + j][y + k] += 1
            if command == "turnoff":
                if not lights[x + j][y + k] == 0:
                    lights[x + j][y + k] -= 1
            if command == "toggle":
                lights[x + j][y + k] += 2

c = 0
for i in lights:
    for j in i:
        c += j

print(c)