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Contest: Task: Related: TaskA TaskC

Score : $600$ points

Problem Statement

You are given a string $s$ consisting of A, B and C.

Snuke wants to perform the following operation on $s$ as many times as possible:

  • Choose a contiguous substring of $s$ that reads ABC and replace it with BCA.

Find the maximum possible number of operations.

Constraints

  • $1 \leq |s| \leq 200000$
  • Each character of $s$ is A, B and C.

Input

Input is given from Standard Input in the following format:

$s$

Output

Find the maximum possible number of operations.

Sample Input 1

ABCABC

Sample Output 1

3

You can perform the operations three times as follows: ABCABC → BCAABC → BCABCA → BCBCAA. This is the maximum result.

Sample Input 2

C

Sample Output 2

0

Sample Input 3

ABCACCBABCBCAABCB

Sample Output 3

6