P1_MARKER = 'X'
P2_MARKER = 'O'
P1_WON = "Player 1 is the winner."
P2_WON = "Player 2 is the winner."
DRAW_GAME = "It's a tie"
OCCUPIED_POSITION = "Can't place marker. Please choose an empty position."
MARK_WAS_PLACED = "Mark_was_placed"
