Guess 4

This game consists of a single player and a two player mode. In single player, a random 4 digit number is generated with digits from 1 to 9. The goal is to guess the number. In two player, you each take turns inputting a 4 digit number from 1 to 9. The goal is to guess the other player's number. In both modes, each guess returns a 2 digit number after it. Ex: 2349 23.