using System;
using System.Collections.Generic;
using System.Linq;
class missCat
{
    static void Main()
    {
        int N = 5;// int.Parse(Console.ReadLine());
        string[] jurry = new string[5] { "aa", "aa", "bb", "bc", "ds" };
        string container = null;

        //for (int i = 0; i < N; i++)
        //{
        //    jurry[i] = Parse(Console.ReadLine());
        //}
        int maxCount = 0;
        int count = 0;
        for (int i = 0; i < N; i++)
        {
            if (container == null || container != jurry[i])
            {
                container += jurry[i];
                if (maxCount < count)
                {
                    maxCount = count;
                }
            }
            else
            {
                count++;
            }
        }
    }

}