• 8 8
  • 10 10
  • 9 9
  • 7 7
  • 1 1
  • 2 2
  • 3 3
  • 4 4
  • 5 5
  • 6 6
  • in case 2 in case 2
  • in case 1 in case 1
  • upper stack keys upper stack keys
  • right hand keys right hand keys