S = list(input())

n = len(S)
ans = set([(1, 1, 1)])
curr = [[1, 0, 0], [0, 1, 0], [0, 0, 1]]
for i in range(n):
    if S[i] == 'a':
        for j in range(3):
            curr[0][j] = -curr[0][j] + curr[1][j] + curr[2][j]
    elif S[i] == 'b':
        for j in range(3):
            curr[1][j] = curr[0][j] - curr[1][j] + curr[2][j]
    elif S[i] == 'c':
        for j in range(3):
            curr[2][j] = curr[0][j] + curr[1][j] - curr[2][j]
    g = (curr[0][0] + curr[1][0] + curr[2][0],
         curr[0][1] + curr[1][1] + curr[2][1],
         curr[0][2] + curr[1][2] + curr[2][2])
    ans.add(g)
print(len(ans))