```cpp

include[HTML_REMOVED]

include[HTML_REMOVED]

using namespace std;
double a[12][12];
int main(){
int i,j,t,l;
double sum=0;
char ch;
cin>>ch;//输入字符啊！！

for(i=0;i<12;i++){
    for(j=0;j<12;j++){
        cin>>a[i][j];
    }
}
for(i=0;i<12;i++){
    for(j=0;j<11-i;j++){
        sum+=a[i][j];
    }
}
if(ch=='S'){
    printf("%.1lf",sum);

}
else if(ch=='M'){
    printf("%.1lf",sum/66);
}
return 0;

}