#include<bits/stdc++.h>
using namespace std;
int main(){
    long long sz[2]={11,21},j1[250005],ans=0,l=0,w=0;
    while(1){
    	char b;
    	cin>>b;
    	if(b=='E'){
            break;  
        }
        else if(b=='L'){
            j1[ans++]=0;
        }
        else if(b=='W'){
            j1[ans++]=1;   
        }
	}
	for(int k=0;k<2;k++){
    	for(long long i=0;i<ans;i++){	
    		l+=1-j1[i];w+=j1[i];
    		    if((l==sz[k]||w==sz[k])&&((max(w,l)-min(w,l))>=2)){
    			cout<<w<<":"<<l<<endl;
    			l=0,w=0; 
    		    }
    	}
    	cout<<w<<":"<<l<<endl;
    	l=0,w=0;
    	cout<<endl;
	}
    return 0;
}