file = [i.rstrip() for i in open("input").readlines()]

class House:
    def __init__(self, x, y):
        self.x = x
        self.y = y
        self.count = 0

    def inc(self):
        self.count = 1

class HouseHolder:
    def __init__(self):
        self.x = 0
        self.y = 0
        self.houses = []
        self._update()

    def _update(self):
        found = False
        for i in self.houses:
            if i.x == self.x and i.y == self.y:
                i.inc()
                found = True
                break

        if not found:
            self.houses.append(House(self.x, self.y))
            self.houses[-1].inc()

    def up(self):
        self.y += 1
        self._update()

    def down(self):
        self.y -= 1
        self._update()

    def right(self):
        self.x += 1
        self._update()

    def left(self):
        self.x -= 1
        self._update()

    def getHouseData(self):
        return len(self.houses)

h = HouseHolder()
hr = HouseHolder()
flip = False

sel = {
        False: h,
        True: hr
}

for i in file[0]:
    if i == ">":
        sel[flip].right()
    if i == "<":
        sel[flip].left()
    if i == "^":
        sel[flip].up()
    if i == "v":
        sel[flip].down()

    flip = not flip

bothhouses = h.houses + hr.houses

ret = []
for i in bothhouses:
    dup = False
    for j in ret:
        if i.x == j.x and i.y == j.y:
            dup = True

    if not dup:
        ret.append(i)

print(len(ret))