import java.io.*;
class Main{
    static BufferedReader read = new BufferedReader(new InputStreamReader(System.in));
    static int N = 100010;
    static int[][] dp = new int[N][4];
    public static void main(String[] args) throws Exception{
        char[] cs = read.readLine().toCharArray();
        int mod = (int) 1e9 + 7;
        for(int i = 1; i <= cs.length; i++){
            dp[i][0] = dp[i - 1][0] + (cs[i - 1] == 'P' ? 1: 0);
            dp[i][1] = dp[i - 1][1] + (cs[i - 1] == 'A' ? dp[i - 1][0]: 0);
            dp[i][2] = dp[i - 1][2] + (cs[i - 1] == 'T' ? dp[i - 1][1]: 0);
            for(int j = 0; j < 3; j++)
                dp[i][j] %= mod;
        }
        System.out.println(dp[cs.length][2]);
    }
}