天才玩意

######蒟蒻######

#include<bits/stdc++.h>
using namespace std;
string s;
char c;
int wm,lm;
void table_tennis(int mark)
{
	wm=lm=0;
	for(int i=0;i<s.length();++i)
	{
			if(s[i]=='E') break;
			if(s[i]=='W') wm++;
			if(s[i]=='L') lm++;
			if(wm-lm>=2&&wm>=mark)
			{
				cout<<wm<<':'<<lm<<endl;
				wm=0;
				lm=0;
			}
			if(lm-wm>=2&&lm>=mark)
			{
				cout<<wm<<':'<<lm<<endl;
				wm=0;
				lm=0;
			}
	}
	if(wm||lm) cout<<wm<<':'<<lm<<endl;
} 
int main(){
	while(cin>>c) 
	{
		if(c=='E') break;
		s+=c;
	}
//	cout<<s<<endl;
	table_tennis(11);
	cout<<endl;
	table_tennis(21);
}