#!/usr/bin/env python3

# Fill Input
input = ""

try:
	with open("3.txt", 'r', encoding='utf-8') as file:
		input += file.read()
except Exception as e:
	print(f"An error occurred: {e}")

# Convert Corrdenate to string
def key_coord(coord):
	return f"{coord[0]},{coord[1]}"

# Result
santas = 1 # or 2

i=0
coords = [[0,0],[0,0]]
houses = {key_coord([0,0]): santas}

for c in input:
	match c:
		case '>':
			coords[i][0]+=1
		case '<':
			coords[i][0]-=1
		case '^':
			coords[i][1]+=1
		case 'v':
			coords[i][1]-=1

	# A Dictonary for all the visisted houses
	key=key_coord(coords[i])
	if key in houses:
		houses[key]+=1;
	else:
		houses[key]=1;

	if santas > 1:
		i^=1

print(len(houses))