01. Largest Common End

using System;

namespace _01._Largest_Common_End
{
    class LargestCommonEnd
    {
        static void Main(string[] args)
        {
            string[] firstArr = Console.ReadLine().Split();
            string[] secondArr = Console.ReadLine().Split();

            int shorter = Math.Min(firstArr.Length, secondArr.Length);
            int leftCount = 0;
            int rigthCount = 0;

            for (int i = 0; i < shorter; i++)
            {
                if (firstArr[i] == secondArr[i])
                {
                    leftCount++;
                }
                if (firstArr[firstArr.Length - 1 - i] == secondArr[secondArr.Length - 1 - i])
                {
                    rigthCount++;
                }
            }
            Console.WriteLine(Math.Max(leftCount, rigthCount));
        }
    }
}