#include <bits/stdc++.h>
using namespace std;
#define int long long
void solve(){
int n;cin >> n;
int cnt[n+1][26],arr[n+1];
memset(cnt , 0 , sizeof(cnt));
for(int i = 1;i<=n;i++){
char ch;cin >> ch;
arr[i] = ch - 'a';
cnt[i][arr[i]]++;
for(int j = 0;j<26;j++){
cnt[i][j] += cnt[i-1][j];
}
}
int pay = 2*n , payda = 1 , l = 1 , r = 1;
for(int i = 1;i<=n;i++){
for(int j = i;j<=n;j++){
int dif = 0 , len = j - i + 1;
for(int k = 0;k<26;k++)dif += (cnt[j][k] - cnt[i-1][k]) > 0;
if(pay * len > dif * payda){
pay = dif;
payda = len;
l = i;
r = j;
}
}
}
cout << l << " " << r << endl;
}
signed main(){
ios_base::sync_with_stdio(0);cin.tie(0);
int testcase = 1;//cin >> testcase;
while(testcase--)solve();
}
