Mobile Digits Puzzle
On the calculator's screen is a small program which shows the same keyboard, but with the buttons in a different order.
When you press a button on the keyboard, then the respective button on the same place on the screen is highlighted. That is: button  on the keyboard highlights button  on the screen; button  on the keyboard highlights button  on the screen; and so on.
The object is to press consecutively some 5 buttons on the keyboard so that the same set of buttons is highlighted on the screen.
Author: Peter Grabarchuk
This Puzzle © 2008 Peter Grabarchuk. All Rights Reserved.
More from Peter Grabarchuk at PeterPuzzle.com
Do you have the answer? Check against our solution!