Place letters A to H on nodes such that:
                    
                        - Each letter appears exactly once.
 
                        - Consecutive letters do not appear on adjacent nodes.
 
                        - Consecutive letters are letters that follow one another in the alphabet (e.g., A
                            and B, B and C).
 
                        - Adjacent nodes are those that are connected with an edge.
 
                    
                    Drag and drop the letters to solve the puzzle.
                        Violated constraints will be marked using a red edge.
                        You can drag letters back to the deck at the bottom if needed.
                    Click here to see a bunch of Crystal Maze
                        contestants trying to
                        solve this puzzle.