import java.util.*;
public class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int q = sc.nextInt();
        String s = sc.next();
        List<Integer> l = new ArrayList<>();
        List<Integer> r = new ArrayList<>();
        for (int i = 0; i < q; i++) {
            l.add(sc.nextInt());
            r.add(sc.nextInt());
        }
        int[] sum = new int[n];
        sum[0] = 0;
        for (int i = 1; i < n; i++) {
            if (s.charAt(i - 1) == 'A' && s.charAt(i) == 'C') {
                sum[i] = sum[i - 1] + 1;
                continue;
            }
            sum[i] = sum[i - 1];
        }
        for (int i = 0; i < q; i++) {
            int left = l.get(i) - 1;
            int right = r.get(i) - 1;
            int ans = sum[right] - sum[left];
            System.out.println(ans);
        }
    }
}

/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