# include<iostream>
# include<cmath>
# include<cstring>
using namespace std;
char win2[250010];
int main()
{
	int cnt = 0;
	while (cin >> win2[cnt++]);
	int n = strlen(win2);
	int w = 0, l = 0;
	for (int j = 0; j <= n; j++)
	{
		if (win2[j] == 'W')
			w++;
		if (win2[j] == 'L')
			l++;
		if ((w > 10 || l > 10) && (abs(w - l) > 1))
		{
			cout << w << ':' << l << endl;
			w = 0;
			l = 0;
		}
	}
	cout << w << ':' << l << endl;
	w = 0;
	l = 0;
	cout << endl;
	for (int j = 0; j <= n; j++)
	{
		if (win2[j] == 'W')
			w++;
		if (win2[j] == 'L')
			l++;
		if ((w > 20 || l > 20) && (abs(w - l) > 1))
		{
			cout << w << ':' << l << endl;
			w = 0;
			l = 0;
		}
	}
	cout << w << ':' << l << endl;
	w = l = 0;
	return 0;
}