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

void solve(string str, int score) {
    int a = 0, b = 0;
    for (int i = 0; i < str.size(); i++) {
        if (str[i] == 'E') break;
        if (str[i] == 'W')
            a++;
        else
            b++;

        if (max(a, b) >= score && abs(a - b) >= 2) {
            printf("%d:%d\n", a, b);
            a = b = 0;
        }
    }
    printf("%d:%d\n", a, b);
}

int main() {
    string str, s;
    while (cin >> s) str += s;

    solve(str, 11);
    puts("");
    solve(str, 21);

    return 0;
}