/* 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 s = "5 = cell:   1   [{1.042}    {10, 2.387, 2.488}  ].";
		// The first occurrence of [{, +2 to skip to the following text.
		int start = s.indexOf("[{") + 2;
 
		// The first occurrence of } after the [{.
		int end = s.indexOf("}", start);
 
		// Extract the substring between these indexes.
		String sub = s.substring(start, end);
 
		System.out.println(sub);
	}
}

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