#include<bits/stdc++.h>
#define rep(i,a,b) for(int i=a;i<=b;i++)
#define dwn(i,a,b) for(int i=a;i>=b;i--)
#define lowbit(x) (x&(-x))
#define MAXN 23
using namespace std;
typedef long long ll;
inline int read(){
	int x=0,f=1;
	char ch=getchar();
	while(ch>'9' || ch<'0'){if(ch=='-') f=-1; ch=getchar();}
	while('0'<=ch && ch<='9') x=(x<<1)+(x<<3)+ch-'0',ch=getchar();
	return x*f;
}
char s[MAXN];
int n;

void work(char *a,int st,int l){
	rep(i,0,l-1) cout<<a[i];cout<<endl; 
	char b[MAXN];
	rep(i,st,l-2){
		if(a[i]=='s' && a[i+1]=='s'){
			rep(j,0,i-1) b[j]=a[j];
			b[i]='B';
			rep(j,i+2,l-1) b[j-1]=a[j];
			work(b,i+1,l-1);
//			cout<<"A:"<<a<<" B:"<<b<<endl;
		}
	}
}
int main(){
//	freopen("11.out","w",stdout);
	cin>>s;
	n=strlen(s);
	rep(i,0,n-1) if('A'<=s[i] && s[i]<='Z') s[i] += ('a' - 'A');
	work(s,0,n);
	return 0;
}