#include<bits/stdc++.h>
using namespace std;
long long x[10086],y[10086],cnt=0;
int main(){
    char a;
    int w1=0,l1=0,w2=0,l2=0;
    while(a!='E'){
        cin>>a;
        
        if(a=='W'){
            w1++;
            w2++;
        }
        else if(a=='L'){
            l1++;
            l2++;
        }
        if(w1==11||l1==11){
            cout<<w1<<':'<<l1<<endl;
            w1=0;
            l1=0;
        }
        if(w2==21||l2==21){
            cnt++;
            x[cnt]=w2;
            y[cnt]=l2;
            w2=0;
            l2=0;
        }
    }
    x[cnt+1]=w2;
    y[cnt+1]=l2;
    cout<<w1<<':'<<l1<<endl;
    cout<<endl;
    for(int i=1;i<=cnt+1;i++){
        cout<<x[i]<<':'<<y[i]<<endl;
    }
}