/* package whatever; // don't place package name! */
 
import java.util.*;
import java.util.regex.*;
import java.lang.*;
import java.io.*;
 
/* Name of the class has to be "Main" only if the class is public. */
class Ideone
{
	public static void main (String[] args) throws java.lang.Exception
	{
		String input = "some text key 12, 32, 311 ,465 and 345. some other text dog 612,\n12, 32, 9 and 10. some text key 1, 2. key 1, 2 dog 3, 4 key 5, 6. key is dog 23, 45. key 4";
	    Pattern p = Pattern.compile("(?:key(?>\\s+and\\s+|[\\s,]+)|(?!^)\\G(?>\\s+and\\s+|[\\s,]+))(\\d+)");
	    Matcher m = p.matcher(input);
	    List<String> numbers = new ArrayList<>();
	    while (m.find()) {
	    	numbers.add(m.group(1));
	    }
	    System.out.println(numbers);
	}
}

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