Func3

#include <bits/stdc++.h>

using namespace std;
using ll = long long;
using ld = long double;

void fnc(string x, set<string> &a, string alp)
{
    string ax = x;
    for (auto &cl : x)
    {
        for (auto cc : alp)
        {
            cl = cc;
            a.insert(x);
            x = ax;
        }
    }
}

int main()
{
    string alp(26, 'a');
    iota(alp.begin(), alp.end(), 97);
    string x;
    cin >> x;
    set<string> a;
    fnc(x, a, alp);
    return 0;
}