题解 | #统计字符#

import java.util.*;
import java.lang.*;

// 注意类名必须为 Main, 不要有任何 package xxx 信息
public class Main {
    public static void main(String[] args) {
        Scanner in = new Scanner(System.in);
        // 注意 hasNext 和 hasNextLine 的区别
        while (in.hasNext()) { // 注意 while 处理多个 case
            String s = in.nextLine();
            String sa = s.replaceAll("[A-Za-z]","");
            int[] out = new int[4];
            out[0] = s.length()-sa.length();
            String sk = s.replaceAll(" ","");
            out[1] = s.length()-sk.length();
            String s0 = s.replaceAll("[0-9]","");
            out[2] = s.length()-s0.length();
            out[3] = s.length()-out[0]-out[1]-out[2];
            for(int i:out){System.out.println(i);}
        }
    }
}