Tron Racers

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

public class Program
{
	public static void Main()
	{
	  	int n = int.Parse(Console.ReadLine());

		char[,] matrix = new char[n,n];

		int firstPlayerRow = -1;
		int firstPlayerCol = -1;
		int secondPlayerRow = -1;
		int secondPlayerCol = -1;

		for(int row=0; row<n; row++)
		{
			char[]currRow = Console.ReadLine().ToCharArray();

			for(int col=0; col<n; col++)
			{
				matrix[row,col]= currRow[col];

				if(matrix[row,col]=='f')
				{
					firstPlayerRow = row;
					firstPlayerCol = col;
				}
				else if (matrix[row,col]=='s')
				{
					secondPlayerRow = row;
					secondPlayerCol = col;
				}
			}
		}

		while(true)
		{
			string[] commands = Console.ReadLine().Split(new char[]{' '},StringSplitOptions.RemoveEmptyEntries);

			string playerOneMove = commands[0];
			string playerTwoMove = commands[1];

			if(playerOneMove == "up")
			{
				if(firstPlayerRow-1>=0)
				{
					firstPlayerRow-=1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
				else
				{
					firstPlayerRow = n-1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
			}
			else if (playerOneMove=="down")
			{
				if(firstPlayerRow +1<n)
				{
					firstPlayerRow+=1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
				else
				{
					firstPlayerRow=0;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
			}
			else if (playerOneMove == "left")
			{
				if(firstPlayerCol-1>=0)
				{
					firstPlayerCol-=1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
				else
				{
					firstPlayerCol=n-1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
			}
			else if (playerOneMove == "right")
			{
				if(firstPlayerCol+1<n)
				{
					firstPlayerCol+=1;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
				else
				{
					firstPlayerCol = 0;

					if(matrix[firstPlayerRow,firstPlayerCol]=='s')
					{
						matrix[firstPlayerRow,firstPlayerCol]='x';
						break;
					}
					else
					{
						matrix[firstPlayerRow,firstPlayerCol]='f';
					}
				}
			}
			if(playerTwoMove == "up")
			{
				if(secondPlayerRow-1>=0)
				{
					secondPlayerRow-=1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
				else
				{
					secondPlayerRow=n-1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
			}
			else if (playerTwoMove == "down")
			{
				if(secondPlayerRow+1<n)
				{
					secondPlayerRow+=1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
				else
				{
					secondPlayerRow = 0;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
			}
			else if (playerTwoMove == "right")
			{
				if(secondPlayerCol+1<n)
				{
					secondPlayerCol+=1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
				else
				{
					secondPlayerCol =0;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
			}
			else if (playerTwoMove == "left")
			{
				if(secondPlayerCol-1>=0)
				{
					secondPlayerCol-=1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
				else
				{
					secondPlayerCol = n-1;

					if(matrix[secondPlayerRow,secondPlayerCol]=='f')
					{
						matrix[secondPlayerRow,secondPlayerCol]='x';
						break;
					}
					else
					{
						matrix[secondPlayerRow,secondPlayerCol]='s';
					}
				}
			}
		}

		for(int row=0; row<n; row++)
		{
			for(int col=0; col<n; col++)
			{
				Console.Write(matrix[row,col]);
			}
			Console.WriteLine();
		}
	}
}