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

void work(string str, int score)
{
    int a = 0, b = 0;
    for (int i = 0; i < str.size() && str[i] != 'E'; i ++ )
    {
        if (str[i] == 'W')
            a ++ ;
        else
            b ++ ;
        if (max(a, b) >= score && abs(a - b) >= 2)
        {
            cout<<a<<":"<<b<<endl;
            a = b = 0;
        }
    }
    cout<<a<<":"<<b<<endl;
}
int main()
{
    string str, s;
    while (cin >> s)
        str += s;
    work(str, 11);
    cout<<endl;
    work(str, 21);
    return 0;
}