import java.util.Scanner;

public class Transform4381 {

//此代码不实现界面

    public static void main(String[] args) {
        Scanner scanner = new Scanner(System.in);

        System.out.print("请输入输入数字: ");
        String input = scanner.nextLine();

        System.out.print("请输入从进制 (2, 8, 10, 16): ");
        int fromBase = scanner.nextInt();

        System.out.print("请输入到进制 (2, 8, 10, 16): ");
        int toBase = scanner.nextInt();

        try {
            int number = Integer.parseInt(input, fromBase);
            String result = Integer.toString(number, toBase);
            System.out.println("转换结果: " + result);
        } catch (NumberFormatException e) {
            System.out.println("输入的数字在指定的进制中无效。");
        }
    }
}