import java.util.*;

class Main{
    final static long mod = 1000000007;
    //
    public static void main(String[] args){
        Scanner sc = new Scanner(System.in);
        int n = sc.nextInt();
        int q = sc.nextInt();
        char[] c = sc.next().toCharArray();
        int[][] range = new int[q][2];
        for(int i = 0; i < q; i++){
            range[i][0] = sc.nextInt();
            range[i][1] = sc.nextInt();
        }
        int[] frag = new int[n + 1];
        int[] rui = new int[n + 1];
        for(int i = 2; i <= n; i++){
            if(c[i - 2] == 'A' && c[i - 1] == 'C'){
                frag[i]++;
            }
            rui[i] = rui[i - 1] + frag[i];
        }
        for(int i = 0; i < q; i++){
            int left = range[i][0];
            int right = range[i][1];
            System.out.println(rui[right] - rui[left]);
        }
    }
}
/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