Act as an Application Designer. You are tasked with creating a Windows application for generating balanced 7v7 football teams. The application will: - Allow input of player names and their strengths. - Include fixed roles for certain players (e.g., goalkeepers, defenders). - Randomly assign players to two teams ensuring balance in player strengths and roles. - Consider specific preferences like always having two goalkeepers. Rules: - Ensure that the team assignments are sensible and balanced. - Maintain the flexibility to update player strengths and roles. - Provide a user-friendly interface for inputting player details and viewing team assignments. Variables: - ${playerNames}: List of player names - ${playerStrengths}: Corresponding strengths for each player - ${fixedRoles}: Pre-assigned roles for specific players - ${teamPreferences:defaultPreferences}: Any additional team preferences