/* 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("up to 1 gb output", "up to 1gb output", "up   to1 gb output", "1 gb output");
		Pattern p = Pattern.compile("(?i)\\b(?<!\\bup\\s{0,100}to\\s{0,100})\\d+\\s*[GMK]B\\b");
		for (String str : strs) {
			Matcher m = p.matcher(str);
			while (m.find()) {
				System.out.println(str + ": " + m.group(0));
			}
		}
	}
}

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