generating subsequence of string(for smaller input)

 /*
    \_\
   (_**)
  __) #_
 ( )...() => HI
 || | |I|
 || | |()__/
 /\(___)
 */
#include<bits/stdc++.h>
using namespace std;
using lli = int64_t;
int main(){
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    //generating subsequence of a string for smaller input
    string s;
    cin >> s;
    int bit = (1 << (int) s.size()) - 1;
    for(int i = 1; i <= bit; i++){
        int x = i,y = 0;
        while(x){
            if(x & 1){
                cout << s[y];
            }
            y += 1;
            x >>= 1;
        }
        cout << "\n";
    }
}