import java.util.*;
class Main
{
    static int countPalindrome(String str)
    {
	    int count = 0;
	    String words[] = str.split(" ");
  	    for(int i=0; i<words.length; i++)
        {
            if(palindrome(words[i]))
            count++;
        }
     return count;
    }

    static Boolean palindrome(String word){
        Boolean ispalindrome = true;
        int len = word.length();
        for(int i=0; i<len; i++)
        {
        if(word.charAt(i)==word.charAt(len-i-1))
            continue;
        else{
            ispalindrome = false;
             break;
            }
        }
      return ispalindrome;
   }

    public static void main(String[] args)
    {
        int j=0;
        String a;
        Scanner s=new Scanner(System.in);
        a = s.nextLine().trim();
        j=countPalindrome(a);
        System.out.println(j);
    }
}