class Solution {
public:
    /**
     * @param s: The given string
     * @return: return the number of Five-character palindrome
     */
    int Fivecharacterpalindrome(string &s) {
        // write your code here
        int sum = 0, n = s.size();
        for(int i = 0; i < n-4; ++i)
        {
            if(s[i]==s[i+4] && s[i+1]==s[i+3] && s[i]!=s[i+1] && s[i]!=s[i+2] && s[i+1]!=s[i+2])
                sum++;
        }
        return sum;
    }
};