#include <iostream>
#include <string>
int main()
{
    std::string str;
    std::cout << "Enter your text: " << std::endl;
    std::getline(std::cin, str);
    int number_of_a(0);
    int best(0);
    bool was_any_a = false;
    for (int i = 1; i < str.length(); i++)
    {
        if (str.at(i) == 'a')
        {
            was_any_a = true;
            if (str.at(i-1) == 'a')
            {
                number_of_a++;
                best = (best <= number_of_a) ? number_of_a : best;
            } else if (i<(str.length()-1))
                {
                    if (str.at(i+1) == 'a')
                    {
                        number_of_a++;
                        best = (best <= number_of_a) ? number_of_a : best;
                    }
                };
        } else number_of_a = 0;
    }
    best = ((best == 0) && (was_any_a)) ? 1 : best;
    std::cout << "There are " << best << " of MAX Sequence of A" << std::endl;
    system("pause");
    return 0;
}