import java.util.HashMap;import java.util.Map;import java.util.Scanner;public class Main { public static void main(String[] args) { Scanner scanner = new Scanner(System.in); String s = scanner.next(); Map mA = new HashMap<>(); // 存储大写字母 Map ma = new HashMap<>(); // 存储小写字母 for (char ss : s.toCharArray()) { if (ss >= 'A' && ss mA.put(ss, mA.getOrDefault(ss, 0) + 1); } if (ss >= 'a' && ss ma.put(ss, ma.getOrDefault(ss, 0) + 1); } } for (Map.Entry entry : mA.entrySet()) { char key = entry.getKey(); int value = entry.getValue(); }}