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: Which of the following characteristics defines an endogenous depression? 
 Options:  <1> Its course is continuous. <2> There is an evening worsening. <3> There is an early awakening. <4> There is a good response to placebo. <5> A neurotic personality intervenes in the etiopathogenesis.

Output: 3


Input: Consider Input: Question: Before a 49-year-old man, asymptomatic, with a family history of a father who died of prostate cancer, a PSA (Specific Prostate Antigen) of 5.9 ng / ml was identified in a routine company control, with a PSA ratio free / Total PSA of 11% and that in a digital rectal examination there is an increase in consistency in the right prostatic lobe, what is the following clinical indication? 
 Options:  <1> Ask the patient to perform a transrectal ultrasound and prostate biopsy. <2> Perform a abdominopelvic CT scan. <3> Start treatment with 5 alpha reductase inhibitors to halve PSA levels. <4> Start combined treatment of LHRH analogues and antiandrogens. <5> Perform a bone scan.

Output: 1


Input: Consider Input: Question: Every experimental measurement is accompanied by the corresponding experimental error. Experimental errors are classified as systematic and random. On these last ones it is possible to be affirmed that: 
 Options:  <1> They are due to a failure of the experiment or the equipment. <2> They generally cause a positive deviation from the measurement. <3> They are equally likely to be positive or negative. <4> They do not affect the final result because they are random. <5> They affect exclusively the accuracy of the results obtained.


Output: 3