Numbers

A simple program that allows a computer or 2 opponents to compete in the "Numbers" game.

Each player has two numbers. Both numbers start with a value of 1.
Goal is to reach a set number (usually 8) by manipulating your number with an opponent's number via addition, subtraction, multiplication, or division
Each player takes turns modifying their numbers until both player's numbers are the goal number
A player cannot perform calculations only between their own numbers
A player cannot modify an opponent's number directly
Numbers are between 0-9
Negative numbers are not allowed
Fractions are not allowed
In the event that a player performs a calculation that exceeds 9, the rightmost digit is preserved (i.e. 3*6 = 18, player number is 8)

(pl1: 1|1, pl2: 1|1) Player 1 adds opponent's left number to their left number
(pl1: 2|1, pl2: 1|1) Player 2 adds opponent's left number to their left number
(pl1: 2|1, pl2: 3|1) Player 1 multiplies opponent's left number with their right number
(pl1: 2|3, pl2: 3|1) Player 2 multiples opponent's right number with their left number
(pl1: 2|1, pl2: 9|1) Player 1 subtracts opponent's right from their right number
(pl1: 2|8, pl2: 9|1) Player 2 subtracts opponent's right number from their left number
(pl1: 2|8, pl2: 1|1) Player 1 adds opponent's right number to their left number
(pl1: 3|8, pl2: 1|1) Player 2 multiplies opponent's right number with their left number
(pl1: 3|8, pl2: 8|1) Player 1 adds opponent's right number to their left number
(pl1: 4|8, pl2: 8|1) Player 2 multiplies opponent's right number with their right number
(pl1: 4|8, pl2: 8|8) Player 2 wins