import java.util.*;

public class Main {

    public static void main(String[] args) {
        // write your code here
        Scanner sc = new Scanner(System.in);

        int n = sc.nextInt();
        int q = sc.nextInt();
        String s = sc.next();
        int[] list = new int[n];
        int lastValue = 0;
        for (int i = 1; i < n; i++) {
            if (s.substring(i - 1, i + 1).equals("AC")) {
                lastValue++;
            }
            list[i] = lastValue;
        }

        for (int i = 0; i < q; i++) {
            int l = sc.nextInt() - 1;
            int r = sc.nextInt() - 1;
            System.out.println(list[r] - list[l]);
        }
    }
}
/tmp/hf-datasets-cache/medium/datasets/42704881117311-config-parquet-and-info-qiankunmu-Project_CodeNet-896c9d36/hub/datasets--qiankunmu--Project_CodeNet_Python800_and_Java250/snapshots/c899fde44a77ba1cc14973ed3de064e4ff3aadc7/Project_CodeNet_Java250.tar.gz