URI Basic 1185

//Problem URI 1185
//https://www.urionlinejudge.com.br/judge/en/problems/view/1185

#include<stdio.h>
int main()
{
    char S;
    double M[12][12],sum=0,avg=0;
    int i,j,n=11;
    scanf("%c",&S);
    for(i=0;i<12;i++)
    {
        for(j=0;j<12;j++)
        {
            scanf("%lf",&M[i][j]);
        }
    }
    for(i=0;i<12;i++)
    {
        for(j=0;j<n;j++,n--)
           sum+=M[i][j] ;
    }
    if(S=='S'){printf("%.1lf\n",sum);}
    else if(S=='M'){
        avg=sum/66.0;
            printf("%.1lf\n",avg);}

    return 0;
}