n=int(input())
L=[]
for i in range(n):
k=""
for j in range(5):
k += input()
L.append(k)
m = 98765432
p1 = -1
p2 = -1
for i in range(n):
for j in range(i+1,n):
cnt = 0
for k in range(35):
if L[i][k] != L[j][k]:
cnt += 1
if m > cnt:
m = cnt
p1 = i+1
p2 = j+1
print(p1,p2)