import sys
from lib import *

data = open(0).read()

part_1 = False

DIRS = {
    "^": (-1, 0),
    ">": (0, 1),
    "v": (1, 0),
    "<": (0, -1),
}

if part_1:
    pos = (0, 0)
    poss = set([pos])

    for c in data:
        d = DIRS[c]
        pos = pos[0] + d[0], pos[1] + d[1]
        poss.add(pos)

    print(len(poss))
    sys.exit(0)

a = (0, 0)
b = (0, 0)
poss = set([a, b])
for i, c in enumerate(data):
    if i % 2 == 0:
        d = DIRS[c]
        a = a[0] + d[0], a[1] + d[1]
        poss.add(a)
    else:
        d = DIRS[c]
        b = b[0] + d[0], b[1] + d[1]
        poss.add(b)

print(len(poss))
sys.exit(0)