import java.util.*;

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[] indices = new int[n];

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

        int[] sums = new int[n + 1];
        for (int i = 0; i < n; i++) {
            sums[i + 1] = sums[i] + indices[i];
        }

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

/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