#include <iostream>
using namespace std;

int main()
{
    int i;
    int j;
    int k;
    int result = 0;
    
    for (k = 1; k <= 12; ++k)
    {
        for (j = 0; j <=3; ++j)
        {
            for (i = 0; i <= 9; ++i)
            {
                if (j == 3 && i == 1)
                {
//                    cout << j << i << endl;
                    break;
                }
                if (k == j + i)
                {
//                    cout << k << j << i << endl;
                      result+=1;
                }
            }
        }       
    }
    cout << result << endl;
}