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

namespace yukicoderTest
{
    class Program
    {
        static void Main(string[] args)
        {
            int n = int.Parse(Console.ReadLine());
            int point = 0;
            bool flg = true;
            for(int i=0;i<n;i++)
            {
                int tmp = int.Parse(Console.ReadLine());
                point = point - tmp;
                if(point==1||point==-1)
                {
                    point = tmp;
                    continue;
                }
                else
                {
                    flg = false;
                }
            }
            if(flg==true)
            {
                Console.WriteLine("T");
            }
            else
            {
                Console.WriteLine("F");
            }
            
        }
    }
}