#include <bits/stdc++.h>
#define IOS ios::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define i64 long long
#define endl '\n'
using namespace std;
const i64 INF = 1e9+7;
const int maxn = 2e6+10;

signed main()
{
    IOS;
    string s; cin >> s;
    int n = s.size();
    vector<string> v;
    for(int i = 0; i < n; ++i) s[i] = s[i] - 'A' + 'a';
    auto dfs = [&](auto self,int x,string t) -> void
    {
        if(x == n)
        {
            v.push_back(t);
            return;
        }
        self(self,x+1,t + s[x]);
        if(x < n-1 && s[x] == 's' && s[x+1] == 's') self(self,x+2,t + 'B');
    };
    dfs(dfs,0,"");
    for(string x : v) cout << x << endl;
    return 0;
}