import numpy as np


def main():
    s = input()
    aa = np.array([1, 0, 0])
    bb = np.array([0, 1, 0])
    cc = np.array([0, 0, 1])

    x = np.array([1, np.sqrt(2), np.sqrt(3)])
    st = {np.dot(x, aa + bb + cc)}
    for ch in s:
        if ch == 'a':
            aa = bb + cc - aa
        elif ch == 'b':
            bb = cc + aa - bb
        elif ch == 'c':
            cc = aa + bb - cc
        st.add(np.dot(x, aa + bb + cc))

    ans = len(st)
    print(ans)


if __name__ == "__main__":
    main()