#include<bits/stdc++.h>
using namespace std;

int main(){
	string s;
	while(1){
		char c;
		cin >> c;
		if (c == 'E') break;
		s += c;
	}
	int w, l, len = s.size();
	//11
	int x;
	if (len%11 == 0) x = len/11;
	else x = len/11+1;
	
	for (int i = 1; i <= x; i++){
		if (max(w, l) >= 11 && abs(w-l) >= 2){
			printf("%d:%d\n", w, l);
		}
		if (s[i] == 'W') w++;
		else l++;
	}
	
	cout << endl;
	//21
	w = l = 0;
	if (len%21 == 0) x = len/21;
	else x = len/21+1;
	
	for (int i = 1; i <= x; i++){
		if (max(w, l) >= 21 && abs(w-l) >= 2){
			printf("%d:%d\n", w, l);
		}
		if (s[i] == 'W') w++;
		else l++;
	}
	
}