dxdy = ((1, 0), (0, 1), (0, 1), (-1, 0), (0, -1), (0, -1))
ABC = ('a', 'b', 'c')
s = input()
st = set([(0, 0)])
t = 0
x, y = 0, 0
for c in s:
    k = ABC.index(c) * 2 + t
    dx, dy = dxdy[k % 6]
    x += dx
    y += dy
    st.add((x, y))
    t += 3
    t %= 6
print(len(st))