using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Enter the string");

        string s = Console.ReadLine();

        int len = s.Length;

        //Console.WriteLine(len);

        char[] sentence = Console.ReadLine().ToCharArray();

        int a = 1;

        int b =1;

        int i = 0;

        while(true)

        {

            int c=a+b;

                a=b;

                b=c;

            if(c<=len)

            {

                Console.WriteLine("true");

                Console.WriteLine(sentence[c]);

            }

            else

                break;

            i++;

        }

    }

}