Strike or Spare

Chef's company wants to make ATM PINs for its users, so that they could use the PINs for withdrawing their hard-earned money. One of these users is Reziba, who lives in an area where a lot of robberies take place when people try to withdraw their money. Chef plans to include a safety feature in the PINs: if someone inputs the reverse of their own PIN in an ATM machine, the Crime Investigation