#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define pll pair<ll,ll>
#define pii pair<int,int>
#define fs first
#define sc second
#define tlll tuple<ll,ll,ll>
string s;
int cnt[26] = {};
int n;
int check(char c = 0){
int re = 0;
if(c)cnt[c-'a']++;
for(auto &i:cnt)re += (i?1:0);
if(c)cnt[c-'a']--;
return re;
}
pll calc(int tar){
memset(cnt,0,sizeof(cnt));
pll re = {1,1};
int pt = 0;
for(int i = 1;i<=n;i++){
if(pt<=i){
pt = i+1;
memset(cnt,0,sizeof(cnt));
cnt[s[i]-'a'] ++;
}
while(pt<=n&&check(s[pt])<=tar){
cnt[s[pt]-'a']++;
pt++;
}
if(re.sc-re.fs+1<pt-i)re = {i,pt-1};
cnt[s[i]-'a']--;
}
return re;
}
int main(){
ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
cin>>n>>s;
s = "#"+s;
tlll ans = make_tuple(1,1,1);
for(int i = 1;i<=26;i++){
pll tmp = calc(i);
tlll tans = make_tuple(i,tmp.fs,tmp.sc);
if(get<0>(tans)*(get<2>(ans)-get<1>(ans)+1)<get<0>(ans)*(get<2>(tans)-get<1>(tans)+1))ans = tans;
}
cout<<(get<1>(ans))<<' '<<(get<2>(ans));
}
