#include<iostream>
#include<cmath>
using namespace std;
int main(){
	char a[2501*25];
	int i=-1,s=0,b=0;
	while(cin>>a[i]&&a[i]!='E'){
		i++;
		if(a[i]=='W')
		s++;
		if(a[i]=='L')
		b++;
		if(abs(s-b)>=2&&(s>=11||b>=11))
		cout<<s<<":"<<b<<endl;s=0;b=0;
	}
	cout<<s<<":"<<b<<endl;
	s=0;b=0;
	for(int j=0;j<i;j++){
		if(a[j]=='W')
		s++;
		if(a[j]=='L')
		b++;
		if(abs(s-b)>=2&&(s>=21||b>=21))
		cout<<s<<":"<<b<<endl;s=0;b=0;
	}
	cout<<s<<":"<<b<<endl;
	return 0;
}