dic = {"a": 0, "b": 1, "c": 2}
S = [dic[s] for s in input()]
st0 = 0 # 0:上向き、1;下向き
st1 = [0, 1, 2] #水平辺、左辺、右辺の順
Moved = {(0, 0)}
now = [0, 0]
for s in S:
    a = st1.index(s)
    if a == 0:
        if st0 == 0:
            now[0] += 1
        else:
            now[0] -= 1
    elif a == 1:
        now[1] -= 1
        st1 = st1[2:] + st1[:2]
    else:
        now[1] += 1
        st1 = st1[1:] + st1[:1]
    st0 ^= 1
    if tuple(now) not in Moved:
        Moved.add(tuple(now))
print(len(Moved))