如何提取两个字符串之间的数字？

import re

def extract_number(string1, string2):
    numbers = re.findall(r'\d+', string1 + string2)
    return [int(num) for num in numbers]

string1 = "abc123def"
string2 = "xyz456"
result = extract_number(string1, string2)
print(result)

import java.util.regex.Matcher;
import java.util.regex.Pattern;

public class ExtractNumber {
    public static void main(String[] args) {
        String string1 = "abc123def";
        String string2 = "xyz456";

        Pattern pattern = Pattern.compile("\\d+");
        Matcher matcher = pattern.matcher(string1 + string2);

        while (matcher.find()) {
            String number = matcher.group();
            int num = Integer.parseInt(number);
            System.out.println(num);
        }
    }
}