#include <iostream>
#include <vector>
#include <cmath>
using namespace std;
int main()
{
  vector<char> a;
  char ch;
  int c=0,b=0;
  while((ch=getchar())!=69)
   {
       if(ch=='\n')
       continue;
       a.push_back(ch);

   }
  for(vector<char>::iterator it=a.begin();it!=a.end();it++)
  {
      if(*it=='W')
       b++;
      else
       c++;
      if((c>=11||b>=11)&&abs(c-b)>=2)
      {
          cout<<b<<':'<<c<<endl;
          c=0,b=0;
      }
  }
  cout<<b<<':'<<c<<endl<<endl;
  c=0,b=0;
  for(vector<char>::iterator it=a.begin();it!=a.end();it++)
  {
      if(*it=='W')
       b++;
      else
       c++;
      if((c>=21||b>=21)&&abs(c-b)>=2)
      {
          cout<<b<<':'<<c<<endl;
          c=0,b=0;
      }
  }
  cout<<b<<':'<<c;
   return 0;
}