[<reference> account management]-> [<input> user input] [user input]-> [<choice> 1. My profile] [1. My profile]-> yes [<reference> user profile] [1. My profile]-> no [<choice> 2. Change language] [2. Change language]-> yes [<reference> choose language] [2. Change language]-> no [<choice> 3. Check balance] [3. Check balance]-> yes [<reference> mini statement inquiry pin authorization] [3. Check balance]-> no [<choice> 4. Change PIN] [4. Change PIN]-> yes [<reference> current pin] [4. Change PIN]-> no [<choice> 5. Opt out of market place] [5. Opt out of market place]-> yes [<reference> opt out of market place pin authorization] [5. Opt out of market place]-> no [<choice> 0. Back] [0. Back]-> yes [<reference> start menu] [0. Back]-> no [<reference> exit invalid menu option]