Normal palindrome is defined as a string that reads the same backwards as forwards, for example "abccba".

Chunked palindrome is defined as a string that you can split into chunks and it will form a palindrome.

For example, "volvo". You can split it into (vo)(l)(vo). Let A = "vo", B = "l", so the original string is ABA which is a palindrome.

Given a string str, find the maximum number of chunks we can split that string to get a chuncked palindrome.

Example 1:

Input: "valve"

Output: 1

Explanation: You can't split it into multiple chunks so just return 1 (valve)

Example 2:

Input: "voabcvo"

Output: 3

Explanation: (vo)(abc)(vo)

Example 3:

Input: "vovo"

Output: 2

Explanation: (vo)(vo)

Example 4:

Input: "volvolvo"

Output: 5

Explanation: (vo)(l)(vo)(l)(vo)

Example 5:

Input: "volvol"

Output: 2

Explanation: (vol)(vol)

Example 6:

Input: "aaaaaa"

Output: 6

Explanation: We can split it into (aaa)(aaa), but the optimal split should be (a)(a)(a)(a)(a)(a)

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