S1-Timer S2-Kangroo S3-R P Scissors enum S4-Rock-Paper-Scissors S5-Make a box S6-Guess S7-Even Array S8-Chess Square S9-Spiral Matrix S10-Variable Sized Array S11-Palindrome S12-Shared letters S13-Email Validation S14-Reversed Integers S15-Max Value S16-Fn Robot S17-Fn Array S18-Fn Fibonacci S19-Fn Staircase S20-OOP 1 S21-OOP 2 S21-OOP 2