#include <bits/stdc++.h>
using namespace std;
#define int long long
#define fi first
#define se second
#define Rep(i, n) for(int i = 1; i <= n; ++i)
#define For(i, a, b) for(int i = a; i <= b; ++i)
#define Ford(i, a, b) for(int i = a; i >= b; --i)
#define Forv(v, h) for(auto &v : h)
#define Bit(x, i) ((x) >> (i) & 1ll)
#define onbit(x, i) ((x) | (1ll << i))
#define offbit(x, i) ((x) &~ (1ll << i))
#define cnt_bit(x) __builtin_popcountll(x)
#define Log2(x) (63 - __builtin_clzll(x))
#define all(h) h.begin(), h.end()
#define reset(h, v) (memset(h, v, sizeof(h)))
#define memoryof(v) (sizeof(v) / 1024 / 1024)
using ii = pair<int, int>;
using ull = unsigned long long;
using db = long double;
using vi = vector<int>;
using vvi = vector<vi>;
using vii = vector<ii>;
const int dx[] = {0, 0, +1, -1};
const int dy[] = {-1, +1, 0, 0};
const int MAXN = 1e5 + 10;
const int MOD = 1e9 + 7;
const int oo = 1e18 + 1;
const int base = 311;
template <class X, class Y> bool maximize(X &a, const Y &b) {
if(a < b) return a = b, true;
return false;
}
template <class X, class Y> bool minimize(X &a, const Y &b) {
if(a > b) return a = b, true;
return false;
}
// (x, y) -> (u, v) = Ckn(u - x, x + y - u - v);
// Ckn(k, a) * Ckn(k, b) = C(a, a + b); (k : 1 -> min(a, b))
void fixmod(int &val) {
if (val < 0) val += MOD*MOD;
val %= MOD;
}
int n, f[26][MAXN];
string s;
int get(int l, int r) {
int res = 0;
For(i, 0, 25) res += (f[i][r] - f[i][l - 1] > 0);
return res;
}
void Progess() {
cin >> n >> s;
s = '$' + s;
For(i, 1, n) {
For (j, 0, 25)
f[j][i] = f[j][i - 1] + (s[i] - 'a' == j);
}
int l = 1, r = n, cnt = get(l, r);
For(dem, 1, 26) {
for (int i = 1, j = 1; i <= n; ++i) {
// if (dem == 2 && i == 7) cerr << j << '\n';
while (j < i && get(j, i) > dem) ++j;
if (get(j, i)*(r-l+1)<=get(l, r)*(i-j+1)) {
cnt = get(j, i);
l = j, r = i;
}
// if (dem == 2 && i == 7) cerr << j << '\n';
}
}
cout << l << ' ' << r << '\n';
}
signed main(void) {
ios_base::sync_with_stdio(false);cin.tie(nullptr);
cout.tie(nullptr);
#define task "main"
if (fopen(task".inp", "r")) {
freopen(task".inp", "r", stdin);
freopen(task".out", "w", stdout);
}//_______________________________
Progess();
cerr << "\nTime elapsed: " << (1.0 * clock() / CLOCKS_PER_SEC) << " s.\n";
return (0 ^ 0);
}
