mật khẩu

#include <iostream>
#include <string>
#include <vector>
using namespace std;
string reverse(string s){
    int a=s.length()+1;
    char newstring[a];
    for(int i=0; i<a; i++){
        newstring[i]=s[a-2-i];
    }
    return newstring;
}
int main(){
    int n;
    cin >> n;
    vector<string> a;
    for(int i=0; i<n ;i++){
        string s;
        cin >> s;
        a.push_back(s);
    }
    bool found=false;
    for(int i=0; i<n-1; i++){
        for(int j=i+1; j<n; j++){
            if(reverse(a[i])==a[j]){
                int mid=(a[i].length()-1)/2;
                cout<<a[i].length()<<" "<<a[i][mid];
                found=true;
                break;
            }
        }
        if(found) break;
    }
}