题解 | #计算某字符出现次数#

import java.util.Scanner;

// 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 sc = new Scanner(System.in);
        String ipt1 = sc.nextLine();
        String ipt2 = sc.nextLine();
        String opt = ipt1.toUpperCase().replaceAll(ipt2.toUpperCase(), "");
        System.out.println(ipt1.length() - opt.length());
    }
}