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'.

Ex Input:
Question: Why is chlorophyll green ?: 
 Options:  <1> Absorbs all wavelengths of the visible spectrum. <2> Absorbs wavelengths only from the red and ultra-red parts of the spectrum (680nm, 700nm). <3> Absorbs wavelengths in the red and blue parts of the visible spectrum. <4> Absorbs wavelengths only from the blue part of the visible spectrum. <5> Absorbs in the near ultraviolet.

Ex Output:
3


Ex Input:
Question: Acetylation of histones affects transcription: 
 Options:  <1> Blocking the incorporation of other components of the transcription machinery. <2> Preventing the remodeling of chromatin. <3> Facilitating the action of helicases. <4> Decreasing sensitivity to nuclear receptors. <5> Reducing the affinity of histones for DNA.

Ex Output:
5


Ex Input:
Question: It contains an imidazole group the side chain of: 
 Options:  <1> Arginine <2> Tyrosine <3> Glutamine <4> Histidine <5> Lysine

Ex Output:

4