import java.util.*;

public class Main {
    public static void main(String[] args) throws Exception {
        // Your code here!
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int q = sc.nextInt();
        String str = sc.next();
        
        int[] cumsum = new int[n + 1];
        for (int i = 1; i < n; i++) {
            if (str.charAt(i - 1) == 'A' && str.charAt(i) == 'C') {
                cumsum[i + 1] = cumsum[i] + 1;
            } else {
                cumsum[i + 1] = cumsum[i];
            }
        }
        
        while (q-- > 0) {
            int start = sc.nextInt();
            int end = sc.nextInt();
            int count = cumsum[end] - cumsum[start];
            
            System.out.println(count);
        }
    }
}
/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