import java.util.*;

public class Main {

    public static void main(String args[]) {

        // 入力
        Scanner sc = new Scanner(System.in);
        int n = Integer.parseInt(sc.next());
        int q = Integer.parseInt(sc.next());
        String s = sc.next();
        Integer[] l = new Integer[q];
        Integer[] r = new Integer[q];
        for (int i = 0; i < q; i++) {
            l[i] = Integer.parseInt(sc.next());
            r[i] = Integer.parseInt(sc.next());
        }
        sc.close();

        // 主処理
        int[] arr = new int[n];
        for (int i = 1; i < n; i++) {
            if (s.charAt(i - 1) == 'A' && s.charAt(i) == 'C') {
                arr[i] = arr[i - 1] + 1;
            } else {
                arr[i] = arr[i - 1];
            }
        }

        // 出力
        for (int i = 0; i < q; i++) {
            int result = arr[r[i] - 1] - arr[l[i] - 1];
            System.out.println(result);
        }
    }
}

/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