/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.*;
/* 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
	{
		List<String> strs = Arrays.asList("aaaa", "zzzzzzz", "AaAaAaAaAaAa3", "123456789123");
		String pat = "(?=[^A-Z]*[A-Z])(?=[^a-z]*[a-z])(?!.*(?:[A-Z]{2}|[a-z]{2}))\\p{Alnum}{10,15}";
		for (String str : strs)
			System.out.println(str + ": " + str.matches(pat));
 
	}
}

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