#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,m,painter[1000005],a,b,s=1000009,back,have[2005]={0},cnt=0;
	bool right,goback=false,end=false;
	cin>>n>>m;
	for(int i=1;i<=n;++i) cin>>painter[i];
	for(int i=1;i<=n;++i){
        if(end) break;
        have[painter[i-1]]-=1;
        if(have[painter[i-1]]==0) cnt--;
		for(int j=i;j<=n;){
            if(goback) j=back;
            else{
                have[painter[j]]++;
                if(have[painter[j]]==1) cnt++;
            }
            right=false;
            goback=false;
            if(cnt==m) right=true;
			if(right&&j-i+1<s){
				a=i;
				b=j;
                s=j-i+1;
			}
            if(j==n&&!right){
                end=true;
                break;
            }
            if(right){
                goback=true;
                back=j;
                break;
            }
            else ++j;
		}
	}
	cout<<a<<" "<<b;
	return 0;
}