import java.util.Scanner;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int n = in.nextInt();
        int q = in.nextInt();
        String s = in.next();
        int c[] = new int[n];

        int count = 0;
        c[0] = count;
        for (int i = 1; i < n; i++) {
            if (s.charAt(i - 1) == 'A' && s.charAt(i) == 'C') {
                count++;
            }
            c[i] = count;
        }

        for (int i = 0; i < q; i++) {
            int l = in.nextInt() - 1;
            int r = in.nextInt() - 1;
            System.out.println(c[r] - c[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