Write a Python program called `itictactoe.py` that will play an interactive game of Tic-Tac-Toe starting from a blank board and iterating between players `X` and `O` until the game is finished due to a draw or a win.

When the game starts, a blank board with cells 1-9 should be shown along with a prompt for the current player (always starting with `X`) to select a cell: