import java.util.*;
import java.util.stream.*;

public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        int N = in.nextInt(), Q = in.nextInt();
        in.nextLine();
        char[] S = in.nextLine().toCharArray();
        int[] l = new int[Q];
        int[] r = new int[Q];
        for (int i = 0; i < Q; i++) {
            l[i] = in.nextInt();
            r[i] = in.nextInt();
        }
        int[] ac = new int[N + 1];
        for (int i = 1; i < N; i++) {
            ac[i] = ac[i - 1] + (S[i - 1] == 'A' && S[i] == 'C' ? 1 : 0);
        }
        for (int i = 0; i < Q; i++) {
            System.out.println(ac[r[i] - 1] - ac[l[i] - 1]);
        }
    }
}
/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