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

namespace Array_Ex
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] array1 = Console.ReadLine().Split(' ');
            string[] array2 = Console.ReadLine().Split(' ');

            int leftCount = 0;
            int rightCount = 0;

            int minLen = Math.Min(array1.Length, array2.Length);

            for (int i = 0; i < minLen; i++)
            {
                if (array1[i] == array2[i]) leftCount++;
            }

            int diff = Math.Max(array1.Length, array2.Length) - minLen;

            for (int i = minLen - 1; i >= 0; i--)
            {
                if (array1.Length < array2.Length && array1[i] == array2[diff + i])
                    rightCount++;
                else if (array2.Length <= array1.Length && array2[i] == array1[i + diff])
                    rightCount++;
            }

            Console.WriteLine(Math.Max(leftCount, rightCount));
        }
    }
}