import java.util.*;

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

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

        StringBuilder sb = new StringBuilder();
        for (int i = 0; i < q; i++) {
            int start = sc.nextInt() - 1;
            int end = sc.nextInt() - 1;

            sb.append(arr[end] - arr[start]).append('\n');
        }
        System.out.println(sb);
    }
}
/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