#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;
constexpr int INF = 1e9;
int main() {
  int n, k;
  cin >> n >> k;
  vector<int> a(n);
  for (int i = 0; i < n; ++i) {
    cin >> a[i];
  }
  int lb = 0, ub = n + 1;
  int l = -1, r = -1;
  while (ub - lb > 1) {
    int len = (lb + ub) / 2;
    vector<int> cnt(1000001);
    int sz = 0;
    for (int i = 0; i < len; ++i) {
      cnt[a[i]]++;
      sz += cnt[a[i]] == 1;
    }
    if (sz <= k) {
      l = 1, r = len;
      lb = len;
      continue;
    }
    for (int i = 0; i + len < n; ++i) {
      cnt[a[i]]--;
      sz -= cnt[a[i]] == 0;
      cnt[a[i + len]]++;
      sz += cnt[a[i + len]] == 1;
      if (sz <= k) {
        l = i + 2, r = i + len + 1;
        break;
      }
    }
    if (r - l + 1 == len) {
      lb = len;
    } else {
      ub = len;
    }
  }
  cout << l << ' ' << r << endl;
}
