i=input
s=sum
t=[]
for n in range(int(i())):
    m,*o=i().split(' ')
    t.append((s(float(y) for y in o)/len(o),m))
t.sort()
print(('{}\n'*5).format(t[-1][1],t[-1][0],t[0][1],t[0][0],s(x for x,y in t)/(n+1)))