This is the 17297th most frequent Russian word.
сценарию
The dative form of "script" or "scenario" in Russian.
In this sentence, 'сценарию' is used in the dative case to indicate the scenario one is adhering to.
Я следую этому сценарию.
I am following this scenario.
Here, 'сценарий' appears in the nominative case as the subject of the sentence referring to the scenario itself.
В сценарий были внесены изменения.
Changes were made to the scenario.
In this example, 'сценарии' is in the prepositional case indicating location or context within the script.