import java.util.*;

public class Main {
  public static void main(String[] args) {
    Scanner sc = new Scanner(System.in);
    int n = Integer.parseInt(sc.next());
    int q = Integer.parseInt(sc.next());
    String str = sc.next();
    char[] ch = new char[n];
    int[] dp = new int[n];
    dp[0] = 0;
    for(int i = 0; i < n; i++) {
      ch[i] = str.charAt(i);
    }
    for(int i = 0; i < n - 1; i++) {
      if(ch[i] == 'A' && ch[i+1] == 'C') dp[i+1] = dp[i] + 1;
      else dp[i+1] = dp[i];
    }
    int l , r, ans;
    for(int i = 0; i < q; i++) {
      ans = 0;
      l = Integer.parseInt(sc.next());
      r = Integer.parseInt(sc.next());
      ans = dp[r-1] - dp[l-1];
      System.out.println(ans);
    }
  }
}

/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