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 str1 = sc.nextLine(); String str2 = sc.nextLine(); int length = str1.length(); String str3 = str1.toUpperCase().replaceAll(str2.toU...