In this task, you are given a multiple-choice question about healthcare. Answer the question based on your information and classify your answers into '1', '2', '3', and '4'.

Input: Consider Input: Question: Indinavir is a selective inhibitor of HIV protease because: 
 Options:  <1> By hydrolysis, the active drug is generated. <2> Rents irreversibly the active center of the enzyme. <3> Its structure mimics the transition state of the reaction catalyzed by the enzyme. <4> It is a suicide inhibitor. <5> Its symmetric structure interacts effectively with the active center of the enzyme.

Output: 3


Input: Consider Input: Question: Virgina Henderson describes the relationship of the nurse with the patient in the following structure: 
 Options:  <1> Levels: Substitution. Help. Accompaniment. <2> Roles: Strange. Person resource. Teacher. Leadership. Substitute. Advice. <3> Skills: Beginner Advanced beginner Effective. Expert. <4> Help modes: Act for another. Lead another. Support another. Provide an environment that fosters development. Teach another <5> Styles: Stimulation. Confirmation. Conservation and continuity of life. Self-image Compensation and rest.

Output: 1


Input: Consider Input: Question: Regarding the molding technique, which of the following characteristics is TRUE? 
 Options:  <1> A structured environment is required. <2> It can be carried out forward and backward. <3> It implies the successive application of reinforcement and extinction. <4> The successive approximations are necessarily part of the final behavior. <5> The goal behavior can be simple or complex.


Output: 3