Problem: The array a with n integers is given. Let's call the sequence of one or more consecutive elements in a segment. Also let's call the segment k-good if it contains no more than k different values.

Find any longest k-good segment.

As the input/output can reach huge size it is recommended to use fast input/output methods: for example, prefer to use scanf/printf instead of cin/cout in C++, prefer to use BufferedReader/PrintWriter instead of Scanner/System.out in Java.

Input

The first line contains two integers n, k (1 ≤ k ≤ n ≤ 5·105) — the number of elements in a and the parameter k.

The second line contains n integers ai (0 ≤ ai ≤ 106) — the elements of the array a.

Output

Print two integers l, r (1 ≤ l ≤ r ≤ n) — the index of the left and the index of the right ends of some k-good longest segment. If there are several longest segments you can print any of them. The elements in a are numbered from 1 to n from left to right.

Examples

Input

5 5
1 2 3 4 5


Output

1 5


Input

9 3
6 5 1 2 3 2 1 4 5


Output

3 7


Input

3 1
1 2 3


Output

1 1

Solution (in JAVA):

Solution:
import java.io.BufferedReader;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.PrintWriter;

import java.util.*;


public class Soly
{
    static ArrayList<Integer>[] adjList;
    static boolean[] visited;
    static  int[] dis,par;
    static int V;

    static int h(int []a,int v){
        int s=0,e=a.length-1,ans=-1,mid=0;
        while (s<=e){
            mid=(s+e)>>1;
            if (a[mid]>=v){
                ans=mid;
                e=mid-1;
            }else s=mid+1;
        }
        return ans;
    }
    static void bfs(int s)
    {
        Queue<Integer> q = new LinkedList<Integer>();
        q.add(s);
        visited[s] = true;
        //dis[s]=0;
        par[s]=0;
        while(!q.isEmpty())
        {
            int u = q.remove();

            for(int v: adjList[u])
                if(!visited[v])
                {
                    visited[v] = true;
                    //dis[v]=dis[u]+1;
                    par[v]=u;
                    q.add(v);
                }
        }
    }
    static final int INF = Integer.MAX_VALUE;

    static void mergeSort(int[] a,int [] c, int b, int e)
    {
        if(b < e)
        {
            int q = (b + e) >>1;
            mergeSort(a,c, b, q);
            mergeSort(a, c,q + 1, e);
            merge(a,c, b, q, e);
        }
    }


    static void merge(int[] a,int[]c, int b, int mid, int e)
    {
        int n1 = mid - b + 1;
        int n2 = e - mid;
        int[] L = new int[n1+1], R = new int[n2+1];
        int[] L1 = new int[n1+1], R1 = new int[n2+1];

        for(int i = 0; i < n1; i++) {
            L[i] = a[b + i];
            L1[i] = c[b + i];
        }
        for(int i = 0; i < n2; i++)  {
            R[i] = a[mid + 1 + i];
            R1[i] = c[mid + 1 + i];
        }
        L[n1] = R[n2] = INF;

        for(int k = b, i = 0, j = 0; k <= e; k++)
            if(L[i] <= R[j]){
                a[k] = L[i];
                c[k] = L1[i++];
            }

            else
            {
                a[k] = R[j];
                c[k] = R1[j++];
            }
    }

    public static void main(String[] args) throws IOException {
        Scanner in = new Scanner(System.in);
        try (PrintWriter or = new PrintWriter(System.out)) {
         int n = in.nextInt();
         int [] a= new int[n];
            for (int i = 0; i < n; i++) {
                a[i] =in.nextInt();
            }
            ArrayList<coooo> b= new ArrayList<>();
            int f=0;
            Map<Long,Integer> map =new TreeMap<>();
            for (int i = 0; i < n; i++) {
                if (map.containsKey(1L*a[i])){
                    map=new TreeMap<>();
                    b.add(new coooo(f+1,i+1));
                    f=i+1;
                }else map.put(1L*a[i],1);
            }

            if (b.size()==0)or.println(-1);
            else {
                coooo f1= new coooo(b.get(b.size()-1).f,n);
                b.set(b.size()-1,f1);
                or.println(b.size());

                for (coooo i : b) {
                    or.println(i.f + " " + i.t);
                }


            }


        }




    }
    static class Scanner {

        StringTokenizer st;
        BufferedReader br;

        public Scanner(InputStream s) {
            br = new BufferedReader(new InputStreamReader(s));
        }

        public String next() throws IOException {
            while (st == null || !st.hasMoreTokens()) {
                st = new StringTokenizer(br.readLine());
            }
            return st.nextToken();
        }

        public int nextInt() throws IOException {
            return Integer.parseInt(next());
        }

        public long nextLong() throws IOException {
            return Long.parseLong(next());
        }

        public String nextLine() throws IOException {
            return br.readLine();
        }

        public double nextDouble() throws IOException {
            String x = next();
            StringBuilder sb = new StringBuilder("0");
            double res = 0, f = 1;
            boolean dec = false, neg = false;
            int start = 0;
            if (x.charAt(0) == '-') {
                neg = true;
                start++;
            }
            for (int i = start; i < x.length(); i++) {
                if (x.charAt(i) == '.') {
                    res = Long.parseLong(sb.toString());
                    sb = new StringBuilder("0");
                    dec = true;
                } else {
                    sb.append(x.charAt(i));
                    if (dec) {
                        f *= 10;
                    }
                }
            }
            res += Long.parseLong(sb.toString()) / f;
            return res * (neg ? -1 : 1);
        }

        public boolean ready() throws IOException {
            return br.ready();
        }

    }



}
class coooo {
    int f;
    int t;


    public coooo(int f, int t) {
        this.f = f;
        this.t = t;
    }


}