import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class Test {
public static void main(String[] args) {
final String str1 = "3dsga2 3";
Matcher matcher1 = Pattern.compile(" ").matcher(str1);
if (matcher1.find()) {
System.out.println("yes");
} else {
System.out.println("no");
}
}
}
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