if (d == "Sunday")
    k = 1;
  else if (d == "Monday")
    k = 2;
  else if (d == "Tuesday")
    k = 3;
  else if (d == "Wednesday")
    k = 4;
  else if (d == "Thursday")
    k = 5;
  else if (d == "Friday")
    k = 6;
  else
    k = 7;