NORTH = "^"
SOUTH = "v"
WEST = "<"
EAST = ">"

def move(pos, d):
    if d == NORTH:
        pos[1] += 1
    if d == SOUTH:
        pos[1] -= 1
    if d == WEST:
        pos[0] -= 1
    if d == EAST:
        pos[0] += 1

def visit(s):
    pos = [0,0]
    visits = set()
    visits.add((pos[0], pos[1]))

    for c in s:
        move(pos, c)
        visits.add((pos[0], pos[1]))

    return len(visits)

def test():
    assert visit(">") == 2
    assert visit("^>v<") == 4
    assert visit("^v^v^v^v^v") == 2

def solution():
    with open("in1") as puzzle:
        l = puzzle.read()
        return visit(l)

if __name__ == "__main__":
    print(f"Houses: {solution()}")