#include <stdio.h>
int w, l;
int win[100005];
int main()
{
	
	char s;
	for (int i = 0;; i++)
	{
		s = getchar();
		if (s == 'E')
			break;
		else if (s == 'W')
			win[i] = 1;
		else if (s == 'L')
			win[i] = 2;
	}
	for (int i = 0; 1 ; i++)
	{
		if (win[i] == 1)
			w++;
		if (win[i] == 2)
			l++;
		if (win[i] == 0)
		{
			printf("%d:%d\n\n", w, l);
			break;
		}
		if (w - l >= 2 || l - w >= 2)
			if (w >= 11 || l >= 11)
			{
				printf("%d:%d\n", w, l);
				w = l = 0;
			}
	}
	w = l = 0;
	for (int i = 0; 1; i++)
	{
		if (win[i] == 1)
			w++;
		if (win[i] == 2)
			l++;
		if (win[i] == 0)
		{
			printf("%d:%d\n", w, l);
			break;
		}
		if (w - l >= 2 || l - w >= 2)
			if (w >= 21 || l >= 21)
			{
				printf("%d:%d\n", w, l);
				w = l = 0;
			}
	}
	return 0;
}