import java.util.Scanner;

class Main {
    public static void main(String[] args) {
        Scanner sc = new Scanner(System.in);
        int N = sc.nextInt();
        int Q = sc.nextInt();
        String S = sc.next();
        int[] count = new int[N];
        for (int i = 0; i < N; i++) {
            if (i == 0) {
                count[i] = 0;
                continue;
            }
            int e = 0;
            if (S.charAt(i-1) == 'A' && S.charAt(i) == 'C') {
                e++;
            }
            count[i] = count[i-1] + e;
        }
        for (int i = 0; i < Q; i++) {
            int l = sc.nextInt();
            int r = sc.nextInt();
            System.out.println(count[r - 1] - count[l - 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