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import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Main
{
public static void main(String[] args) {
String patt = "\\D+(\\d+)";
String target = "abc123def456";
Pattern pattern = Pattern.compile(patt);
Matcher matcher = pattern.matcher(target);
while (matcher.find()) {
System.out.println(matcher.group(1));
}
}
}
