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

char a[200005];

int main()
{
    char c;
    int cnt=0;
    int n1=0,n2=0;
    for (int i=1;true;i++)
    {
    	cin >> c;
        if (c=='E') break;
        if (n1>=11 && n1-n2>=2)
        {
            cout << n1 << ":" << n2 << endl;
            n1=0;
            n2=0;
        }
        else if (n2>=11 && n2-n1>=2)
        {
            cout << n1 << ":" << n2 << endl;
            n1=n2=0;
        }
        cnt++;
        a[i]=c;
        if (a[i]=='W') n1++;
        else n2++;
    }
    cout << n1 << ":" << n2 << endl;
    cout << endl;
    n1=0;
    n2=0;
    for (int i=1;i<=cnt;i++)
    {
        if (n1>=21 && n1-n2>=2)
        {
            cout << n1 << ":" << n2 << endl;
            n1=0;
            n2=0;
        }
        else if (n2>=21 && n2-n1>=2)
        {
            cout << n1 << ":" << n2 << endl;
            n1=n2=0;
        }
        if (a[i]=='W') n1++;
        else n2++;
    }
    cout << n1 << ":" << n2 << endl;
    
    return 0;
}