//#include"holiday.h"
#include <bits/stdc++.h>
#define ll long long
#define rep(i,m,n) for(int i=(m); i<=(n); i++)
#define REB(i,m,n) for(int i=(m); i>=(n); i--)
#define pii pair<int,int>
#define pll pair<ll,ll>
#define MP make_pair
#define fs first
#define se second
#define bit(msk, i) ((msk >> i) & 1)
#define iter(id, v) for(auto id : v)
#define pb push_back
#define SZ(v) (ll)v.size()
#define ALL(v) v.begin(),v.end()
using namespace std;
mt19937_64 rd(chrono :: steady_clock :: now ().time_since_epoch().count());
ll Rand (ll l, ll r) { return uniform_int_distribution<ll> (l, r) (rd); }
const int N = 1e5 + 7;
const int Mod = 1e9 + 9999;///lon
const ll INF = 1e18 + 7;
const ll BASE = 137;
const int szBL = 450;
int n;
int lst[250];
void solution () {
cin >> n;
string s;
cin >> s;
s = '.' + s;
set<int> Idx;
Idx.insert(0);
auto comp = [&] (pii &A, pii B) -> bool {
if (1LL * A.fs * B.se < 1LL * B.fs * A.se) return 0;
A = B;
return 1;
};
pii opt = {1, 1}, res = {1, 1};
rep (i, 1, n) {
if (lst[s[i]] != 0) {
Idx.erase(lst[s[i]]);
}
Idx.insert(i);
lst[s[i]] = i;
int Len = 0;
for (auto j = Idx.rbegin(); j != Idx.rend(); ++j) {
int curP = *j;
// cout << curP + 1<<" "<<i<<"\n";
if (Len != 0 && comp(opt, MP(Len, i - curP))) {
res = {curP + 1, i};
}
++Len;
}
}
cout << res.fs <<" "<<res.se<<"\n";
}
#define file(name) freopen(name".inp","r",stdin); \
freopen(name".out","w",stdout);
int main () {
// file("c");
ios_base :: sync_with_stdio(false); cin.tie(0); cout.tie(0);
int num_Test = 1;
// cin >> num_Test;
while (num_Test--)
solution();
}
/*
no bug challenge +30
20 50 22
15 26 1
18 20 1
3 41 0
7 16 0
1 38 0
4 3 1
16 23 1
14 48 1
20 19 0
17 10 1
12 31 0
16 21 0
13 23 1
15 16 1
1 40 1
13 46 0
9 29 1
7 48 1
19 17 1
16 34 0
8 8 1
4 10 1
*/
