import java.io.PrintWriter;
import java.util.Scanner;

public class Main {

	static void exec(Scanner in, PrintWriter out) {
		in.nextInt();
		int Q = in.nextInt();
		String S = in.next();
		int[] t = new int[S.length()];
		for (int i = 0; i < t.length - 1; i += 1) {
			if (S.charAt(i) == 'A' && S.charAt(i + 1) == 'C') {
				t[i + 1] = t[i] + 1;
			} else {
				t[i + 1] = t[i];
			}
		}
		for (int i = 0; i < Q; i += 1) {
			int l = in.nextInt();
			int r = in.nextInt();
			out.println(t[r - 1] - t[l - 1]);
		}
	}

	public static void main(String[] args) {
		PrintWriter w = new PrintWriter(System.out);
		exec(new Scanner(System.in), w);
		w.flush();
	}
}

/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