#include<iostream>
#include<cmath>
#include<string>
using namespace std;
long long i,k=0,w=0,l=0,w1=0,l1=0,a[100000],b[100000];
int main()
{
   char t;
   do{
   	cin>>t;
   	if(t=='W'){
   		w++;
   		w1++;
   	}else if(t=='L'){
   		l++;
   		l1++;
   	}
   	if((w>=11||l>=11)&&abs(w-l)>1){
   		cout<<w<<":"<<l<<endl;
   		w=0;
   		l=0;
   	}
   	if((w1>=21||l1>=21)&&abs(w1-l1)>1){
   		k++;
   		a[k]=w1;
   		b[k]=l1;
   		w1=0;
   		l1=0;
   	}
   }while(t!='E');
   cout<<w<<":"<<l<<endl<<endl;
   for(i=0;i<=k;i++){
   	cout<<a[i]<<":"<<b[i]<<endl; 
   }
   cout<<w1<<":"<<l1;
   return 0;
}