#include<bits/stdc++.h>
using namespace std;
#define int long long
signed main(){
ios_base::sync_with_stdio(false);
cin.tie(0); cout.tie(0);
int n; cin >> n;
string s; cin >> s;
vector<vector<int>> p(n + 1, vector<int>(27, n));
for(int i = n - 1; i >= 0; i--){
p[i] = p[i + 1];
p[i][s[i] - 'a'] = i;
}
int L = -1, R, LEN;
for(int i = 0; i < n; i++){
sort(p[i].begin(), p[i].end());
for(int j = 0; p[i][j] < n; j++){
if(L == -1 || (j + 1) * (R - L + 1) < LEN * (p[i][j + 1] - i)){
//(p[i][j + 1] - 1 - i + 1) / (j + 1) VS (R - L + 1) / LEN
L = i;
R = p[i][j + 1] - 1;
LEN = j + 1;
}
}
}
cout << L + 1 << " " << R + 1;
}
