from collections import Counter
f=open("regiviisid.txt", encoding="utf-8")
f.readline()
m=["-".join(rida.split(",")[10:12]) for rida in f.readlines()]
print(m[:8])
c=Counter(m)
for voti in c.keys():
 if c[voti]>100:
  print(voti, " - ", c[voti])
  
#Leidke levinumad alguskolmikud
#Leidke levinumad algusnoodid viisides, mille tugiheli (tulp nr 6) on g