View difference between Paste ID: eKDezcf6 and H809XjJE

 #include <bits/stdc++.h>
 
 using namespace std;
 using ll = long long;
 using ld = long double;
 
 void fnc(string x, set<string> &a)
 {
     for (int i = 0; i < x.size() - 1; i++)
     {
         swap(x.at(i), x.at(i + 1));
         a.insert(x);
         swap(x.at(i), x.at(i + 1));
     }
 }
 
 int main()
 {
     string x;
     cin >> x;
     set<string> a;
     fnc(x, a);
     return 0;
 }