Python 3.9.7 (tags/v3.9.7:1016ef3, Aug 30 2021, 20:19:38) [MSC v.1929 64 bit (AMD64)] on win32
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>>> 
===== RESTART: C:\Users\dksin\Dropbox\My PC (LAPTOP-E383CH2K)\Desktop\1.py =====
Sim(C1, C2) = 0.7251908396946565
Sim(C2, C3) = 0.10679611650485436
Sim(C3, C1) = 0.11330049261083744
>>> 