using System;
using System.Linq;
class LargestCommonEnd
{
    static void Main(string[] args)
    {
        string[] wordsFirst = Console.ReadLine().Split(' ').ToArray();
        string[] wordsSecond = Console.ReadLine().Split(' ').ToArray();
        int countLeftRight = 0;
        int countRightLeft = 0;
        for (int i = 0; i < wordsFirst.Length && i < wordsSecond.Length; i++)
        {
            if (wordsFirst[i] == wordsSecond[i])
            {
                countLeftRight++;
            }
        }
        for (int j = 0; j < wordsFirst.Length && j < wordsSecond.Length; j++)
        {
            if (wordsFirst[wordsFirst.Length - 1 - j] == wordsSecond[wordsSecond.Length - 1 - j])
            {
                countRightLeft++;
            }
        }
        Console.WriteLine(countRightLeft > countLeftRight ? countRightLeft : countLeftRight);

    }
}