#include<iostream>
#include<cmath>
using namespace std;
char str[100010];
int cnt = 0;
void show(int x)
{
    int a = 0 , b = 0 ;
    for(int i = 1;i <= cnt;i++)
    {
        if(str[i] == 'W')
            a++;
        if(str[i] == 'L') 
            b++;

        if((a >= x || b >= x ) && abs( a - b ) >= 2)
        {
            cout << a << ":" << b << endl;
            a = 0;
            b = 0;
        }
    }
    cout << a << ":" << b << endl;
}
int main()
{
    char ch;
    while(cin >> ch && ch != 'E')
    {
        if(ch == 'W' || ch == 'L')
            str[cnt++] = ch;
    }
    show(11);
    cout << endl;
    show(21);
    return 0;
}