/* package whatever; // don't place package name! */
 
import java.util.*;
import java.lang.*;
import java.io.*;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
 
/* 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
	{
		final String regex = "^(?:AMDF|SB700).*\\.(?!tmp$)[^.]+$";
		final String[] files = {
			"AMDF123978sudjfadfs.ext",
			"SB700afddasjfkadsfs.ext",
			"AMDE41312312089fsas.ext",
			"SB701fs98dfjasdjfsd.ext",
			"AMDF123120381203113.tmp"
		};
 
		final Pattern pattern = Pattern.compile(regex, Pattern.MULTILINE);
 
		for (String file:files) {
			final Matcher matcher = pattern.matcher(file);
			if(matcher.matches()) {
				System.out.println(matcher.group(0));
			}
		}
	}
}
 
 

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