Split-Houses.cpp

#include <iostream>
using namespace std;
int main()
{
 int n;
 cin>>n;
 string s;
 cin>>s;
 for(int i=0;i<n;i++)
 {
 if(s[i]=='H' && s[i+1]=='H')
 
 {
 
 cout<<"NO"<<endl;
 
 exit(0);
 
 }
 
 if(s[i]=='.')
 
 s[i]='B';
 
 }
 
 cout<<"YES"<<endl;
 
 cout<<s;
 
}