private static void Main()
{
var numbers = new List<string>();
int numbersCount = int.Parse(Console.ReadLine());
for (int i = 0; i < numbersCount; i++)
{
string[] command = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string add = string.Empty;
if (command[0] != command[3])
{
if (command[2].ToLower() == "before")
{
add = command[0] + command[3];
}
else
{
add = command[3] + command[0];
}
numbers.Add(add);
}
}
INumberRecover numberRecover = new NumberRecoverByBuildingGraph(numbers);
string originalNumber = numberRecover.Recover();
Console.WriteLine(originalNumber);
}
private static void Main()
{
var numbers = new List <string>();
int numbersCount = int.Parse(Console.ReadLine());
for (int i = 0; i < numbersCount; i++)
{
string[] command = Console.ReadLine().Split(new[] { ' ' }, StringSplitOptions.RemoveEmptyEntries);
string add = string.Empty;
if (command[0] != command[3])
{
if (command[2].ToLower() == "before")
{
add = command[0] + command[3];
}
else
{
add = command[3] + command[0];
}
numbers.Add(add);
}
}
INumberRecover numberRecover = new NumberRecoverByBuildingGraph(numbers);
string originalNumber = numberRecover.Recover();
Console.WriteLine(originalNumber);
}