class Solution {
public:
    int minimumMoves(string s) {
        int ans = 0;
        int flag = 0;
        int num = 0;
        for (int i = 0; i < s.length(); i++) {
            if (s[i] == 'X') {
                flag++;
                num++;
            } else {
                if (flag != 0) num++;
            }
            if (num == 3) {
                num = 0;
                flag = 0;
                ans++;
            }
        }
        if (num != 0) ans++;
        return ans;
    }
};