# include <iostream>
using namespace std;
const int maxn = 1e6+5;
int main ()
{
	char x;
	int a = 0,b = 0,c = 0,d = 0;
	int p[maxn],q[maxn];
	int i = 0,j = 0;
	while(1)
	{
		cin>>x;
		if(x == 'E')
		break;
		else if(x == 'W')
		{
			a++;
			c++;
		}
		else
		{
			b++;
			d++;
		}
		if(a == 11||b == 11)
		{
			a = b = 0;
			p[i++] = a;
			p[i++] = b;
		}
		if(c == 21||d == 21)
		{
			c = d = 0;
			q[j++] = c;
			q[j++] = d;
		}
	 } 
	 for(int k = i;k > 0;k--)
	 {
	 	cout<<p[k]<<':'<<p[--k]<<endl;
	 }
	 for(int k = j;k > 0;k--)
	 {
	 	cout<<q[k]<<':'<<q[--k]<<endl;
	 }
	return 0;
}