#include <iostream>
using namespace std;
int main() {
int l;
char t;
double matriz[12][12];
double soma = 0.0;
cin >> l >> t;
for (int i = 0; i < 12; i++) {
for (int j = 0; j < 12; j++) {
cin >> matriz[i][j];
if (i == l) {
soma += matriz[i][j];
}
}
}
t == 'S';
cout << soma << endl;
return 0;
}
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