n, k = map(int, input().split())
a = list(map(int, input().split()))
right = 0
zmin = 10 ** 6
d = dict()
d[a[0]] = 1
for left in range(n):
      while right < n - 1 and len(d) < k:
            right += 1
            if a[right] not in d:
                  d[a[right]] = 1
            else:
                  d[a[right]] += 1
      if right-left < zmin and len(d) == k:
            zmin = right-left
            r = right
            l = left
      d[a[left]] -= 1
      if d[a[left]] == 0:
            del d[a[left]]

print(l+1, r+1)