C++ :

#include <iostream>
#include <cstdio>
#include <cmath>
using namespace std;

void f(string s, int score) {
	int w = 0, l = 0;
	for (int i = 0; i < s.size(); i++){
		if (s[i] == 'E') break;
		
		if (s[i] == 'W') w ++;
		if (s[i] == 'L') l ++;
		
		if ((w>=score || l>=score) && abs(w-l)>=2) {
			printf("%d:%d\n", w, l);
			w = l = 0;
		}		
	}
	printf("%d:%d\n\n", w, l);
}

int main() {
	string s, str;
	while (cin >> str) {
		s += str;
	}
	
	f(s, 11);
	f(s, 21);
	
	return 0;
}