#include <bits/stdc++.h>
using namespace std;
using ll = long long;
using vb = vector<bool>;
using vvb = vector<vb>;
using vi = vector<int>;
using vvi = vector<vi>;
using vl = vector<ll>;
using vvl = vector<vl>;
using vc = vector<char>;
using vvc = vector<vc>;
using vs = vector<string>;
const ll mod = 1e9 + 7,inf = 1e18;
#define pb push_back
#define fast ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
void setIO()
{
fast;
}
int main()
{
setIO();
int n;
cin>>n;
vi a(n + 1);
for (int i = 1;i<=n;i++){
char x;
cin>>x;
a[i] = x - 'a';
}
ll ansNum = 1,L = 1,R = 1,ansCur = 1;
for (int num = 1;num<=26;num++){
vi freq(27);
ll l = 1,r = 1,cnt = 0;//[l,r)
ll maxL = 1,maxR = 1;
ll cur = 1;
while (r <= n){
while (cnt <= num && r <= n){
if (r - l > cur){
cur = r - l;
maxL = l;
maxR = r - 1;
}
if (num == 23){
//if (r == 82)assert(s.count(a[r - 1]));
//for (int i = l;i<r;i++)s.insert(a[i]);
//assert(s.size() <= num);
//cout<<l<<" "<<r<<" "<<s.size()<<'\n';
}
freq[a[r]]++;
if (freq[a[r]] == 1)cnt++;
r++;
}
if (cnt <= num){
//if (num == 23)cout<<"HERE "<<l<<" "<<r<<'\n';
if (r - l > cur){
cur = r - l;
maxL = l;
maxR = r - 1;
}
}
while (cnt > num){
freq[a[l]]--;
if (freq[a[l]] == 0)cnt--;
l++;
}
}
//cout<<num<<" H "<<cur<<" "<<maxL<<" "<<maxR<<'\n';
if (num * ansCur < ansNum * cur){
ansCur = cur;
ansNum = num;
L = maxL;
R = maxR;
}
}
cout<<L<<" "<<R<<'\n';
return 0;
}
