#include <bits/stdc++.h>
using namespace std;
int cnt1,cnt2;
char c;
string s; 
int main()
{
    while(scanf("%c",&c) == 1)
    {
		if(c == 'E') break;
		if(c != ' ' && c != '\n') s += c;
	}
	int len = s.length();
	for(int i = 0;i < len;i++)
	{
		if(s[i] == 'W') cnt1++;
		else cnt2++;
		if((cnt1 >= 11 || cnt2 >= 11) && abs(cnt1 - cnt2) >= 2)
		{
			cout << cnt1 << ':' << cnt2 << endl;
			cnt1 = 0,cnt2 = 0;
		}
	}
	cout << cnt1 << ':' << cnt2 << endl << endl;
	cnt1 = 0,cnt2 = 0;
	for(int i = 0;i < len;i++)
	{
		if(s[i] == 'W') cnt1++;
		else cnt2++;
		if((cnt1 >= 21 || cnt2 >= 21) && abs(cnt1 - cnt2) >= 2)
		{
			cout << cnt1 << ':' << cnt2 << endl;
			cnt1 = 0,cnt2 = 0;
		}
	}
	cout << cnt1 << ':' << cnt2 << endl;
    return 0;
}