import java.util.Scanner;

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();
		String S = sc.next();
		String[] SSplit = S.split("");
		int[][] LR = new int[Q][2];
		for (int i = 0; i < Q; i++) {
			LR[i][0] = sc.nextInt();
			LR[i][1] = sc.nextInt();
		}
		int[] subSum = new int[N];
		subSum[0] = 0;
		boolean mode = SSplit[0].equals("A");

		for (int i = 1; i < N; i++) {
			if (SSplit[i].equals("A")) {
				subSum[i] = subSum[i - 1];
				mode = true;
			} else if (mode && SSplit[i].equals("C")) {
				subSum[i] = subSum[i - 1] + 1;
				mode = false;
			} else {
				subSum[i] = subSum[i - 1];
				mode = false;
			}
		}

		for (int i = 0; i < Q; i++) {
			System.out.println(subSum[LR[i][1] - 1] - subSum[LR[i][0] - 1]);
		}
	}
}
/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