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()

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

print(h.getHouseData())