Lesson #12

using System;

class PipeServer
{
    static void Main()
    {
        string J = Console.ReadLine();
        string S = Console.ReadLine();

        int count = 0;
        foreach (var j in J)
        {
            foreach (var s in S)
                if (j == s)
                {
                    count++;
                }
        }

        Console.WriteLine(count);
    }
}