#include<iostream>
#include<algorithm>
using namespace std;
void work(string str,int score){
    int a=0,b=0,i;
    for(i=0;i<str.size()&&str[i]!='E';i++){
        if(str[i]=='W')a++;
        else b++;
        if(max(a,b)>=score&&abs(a-b)>=2){
            printf("%d:%d\n",a,b);
            a= b=0;
        }
    }
    printf("%d:%d\n",a,b);
}
int main()
{
    string str,s;
    while(cin>>s)str+=s;
    work(str,11);
    printf("\n");
    work(str, 21);
    return 0;
}