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In this tutorial, we will learn about Verifiable Random Functions by building a guessing game on the Solana blockchain using Orao Network's Random Verifiable Function service.

We will implement the Solana program on-chain, which generates a random number between 0 and 10. We will then build a simple CLI interface to interact with the program. The CLI will prompt the user for a number. After a guess is entered, the program will indicate whether the guess is too low or too high. If the guess is correct, the game will print a congratulatory message and exit.