#include <iostream>
using namespace std;
int main()
{
int n,flag=1,t,i;
cin>>n;
t=n/100;
for(i=0;i<t;i++)
cout<<"B";
n%=100;
t=n/10;
for(i=0;i<t;i++)
cout<<"S";
n%=10;
t=n;
for(i=0;i<t;i++)
cout<<i+1;
cout<<endl;
return 0;
}
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