L=[] L1=[] for i in range(7): a,b=map(int,input('').split(' ')) sum=a+b L.append(sum) count=0 for each in L: if each>8: a=L.index(each) L1.append(a) count+=1

if count==0: print(0) elif count==1: print(a+1) else: print(L1[0]+1)