/* package whatever; // don't place package name! */
 
import java.util.*;
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 msg = "could not execute batch; SQL [insert into products (version, amount, brand_id, created_at, description, name, price, status, id) values (?, ?, ?, ?, ?, ?, ?, ?, ?)]; constraint [fk_products_brand_id]; ";
		String afterBrace = msg.substring(msg.lastIndexOf("[")+1);
		String key = afterBrace.substring(0, afterBrace.indexOf("]"));
		System.out.println(key);
 
	}
}

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