import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStreamReader;
import java.util.HashMap;

public class Main {
    public static void main(String[] args) throws IOException {
        BufferedReader reader = new BufferedReader(new InputStreamReader(System.in));
        HashMap<String,Integer> map = new HashMap<>(32);
        String[] str = reader.readLine().split(" ");
        int n = Integer.parseInt(str[0]);
        for (int i = 0; i < n; i++) {
            String [] arr = reader.readLine().split(" ");
            String q = arr[0];
            String t = arr[1];
            if (q.equals("I"))
            {
                //插入操作
                if (map.containsKey(t)) map.put(t, map.get(t) + 1);
                else map.put(t,1);
            }
            //询问操作
            else
            {
                if (map.containsKey(t)) System.out.println(map.get(t));
                else System.out.println(0);
            }
        }
    }
}