That's the code:

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

namespace _1612trams_b
{
    class Program
    {
        static void Main(string[] args)
        {
            string[] sArray = Console.In.ReadToEnd().Split();
            char[] separator = { ' ', ',', '.', '\n', '-', ':', '!', '?' };
            //string[] sArray = Console.ReadLine().Split(separator);
            int numTram = 0, numTrol = 0;
            foreach (string s in sArray)
                if (s == "tram") numTram++;
                else if (s == "trolleybus") numTrol++;
            if (numTram > numTrol) Console.WriteLine("Tram driver");
            else if (numTram < numTrol) Console.WriteLine("Trolleybus driver");
            else Console.WriteLine("Bus driver");
            //Console.Read();
        }
    }
}

Can anyone tell a test that can go wrong here?