nc.cpp

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*/                              
#include<bits/stdc++.h>
using namespace std;
 
#define fastio ios_base::sync_with_stdio(0); cin.tie(0)
#define LL long long 
#define mod 1000000007 
#define FOR(i, j, k) for (int i=j ; i<k ; i++)
#define ROF(i, j, k) for (int i=j ; i>=k ; i--) 
#define debug(...) fprintf(stderr, __VA_ARGS__), fflush(stderr)
#define time__(d) for(long blockTime = 0; (blockTime == 0 ? (blockTime=clock()) != 0 : false); debug("%s time : %.4fs", d, (double)(clock() - blockTime) / CLOCKS_PER_SEC))

const long long INF = 1e18;
const long long MAX = 1e5+10;
int main(){
    fastio;
    int t=1;// cin>>t;
    while(t--){
        int n,k; cin>>n>>k;
        int a[n]; FOR(i,0,n) cin>>a[i]; 
        set<int>s;
        ROF(i,n-1,0) s.insert(a[i]),a[i]=s.size();
        int l=0,r=1e7;
        FOR(i,0,n){
            int lo=i,hi=n-1,val=a[i]-k+1,rr=i-1;
            if(val<=0) continue;
            while(lo<=hi){
                int m = lo + (hi-lo)/2;
                if(a[m]<=val) rr=m,hi=m-1;
                else lo=m+1;
            }
            if(rr-i+1<r-l+1) {l=i,r=rr;} 
                  //  cout<<l<<" "<<r<<" ";
        }
        if(r!=1e7) 
        cout<<l+1<<" "<<r+1;
       else cout<<-1<<" "<<-1;
    }
}