Last Saturday, I suddenly had a sharp pain in my side. I realized that it was kidney stones. I had it once before about 15 years ago. The pain was terrible, so I had to cancel my classes on Sunday and Monday. I am sorry to everyone about that. The pain is mostly gone now, and I feel much better, but I will go to see a doctor tomorrow morning, so I must cancel X class in the morning. I will come to class again in the afternoon, so I look forward to seeing everyone again! Thank-you for your kind understanding and support.