1040

// 部分结果超时，怎么处理？
//

#include "stdafx.h"
#include<iostream>
#include<string>


using namespace std;

unsigned count_pat(string &tmp)
{
    unsigned count = 0;
    for (size_t i = 0; i < tmp.size(); ++i)
    {
        if (tmp[i] == 'P')
        {
            for(size_t j=i+1;j<tmp.size();++j)
                if (tmp[j] == 'A')
                {
                    for (size_t k = j + 1; k < tmp.size(); ++k)
                    {
                        if (tmp[k] == 'T')
                        {
                            ++count;
                            count = count % 1000000007;
                        }
                    }
                }
        }
    }
    return count;
}

int main()
{
    string str;
    cin >> str;

    cout << count_pat(str);

    system("pause");
    return 0;
}