Help the chief inspector piece together the official report of the notorious diamond heist by choosing the correct phrase for each blank.

The inspector noted in her report that had it not been for the sudden, unexplained power outage, the vault's laser grid would have triggered immediately.

She also added a bitter footnote stating that had the guards realized the "janitor" was actually a master of disguise, they would still be happily employed today.

The inspector noted in her report that had it not been for the sudden, unexplained power outage, the vault's laser grid would have triggered immediately.

This is an inverted third conditional (meaning "If it had not been for..."). Because the consequence is in the past ("would have triggered"), we need the past perfect form to express an unreal past condition.

She also added a bitter footnote stating that had the guards realized the "janitor" was actually a master of disguise, they would still be happily employed today.

This is an inverted mixed conditional. The condition is in the past ("had the guards realized"), but the consequence is in the present ("would still be employed today"). "Were the guards to realize" would be a second conditional referring to a hypothetical present/future, which doesn't fit the past failure.