fin=open('psychin.txt','r')
info=fin.read().split()
cards=[0]*14
for i in range(13):cards[int(info[i])]=i+1
fin.close()
k=[]
for i in range(13):
k.append(91-sum(cards[13-j] for j in range(i+1))-cards[13-i])
fout=open('psychout.txt','w')
fout.write(str(max(k)))
fout.close()