using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace common_end
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] firstLine = Console.ReadLine().Split(' ').ToArray();
            string[] secondLine = Console.ReadLine().Split(' ').ToArray();

            int minLength = Math.Min(firstLine.Length, secondLine.Length);
            int matchedWordsLeft = 0;
            int mathedWordsRight = 0;


            for (int i = 0; i < minLength; i++)
            {
                if (firstLine[i] == secondLine[i])
                {
                    matchedWordsLeft++;
                }

                if (firstLine[firstLine.Length - 1 - i] == secondLine[secondLine.Length - 1 - i])
                {
                    mathedWordsRight++;
                }
            }

            Console.WriteLine(Math.Max(matchedWordsLeft,mathedWordsRight));
        }
    }
}