This is the application collecting answers from students.
Input number will be a number of keyboard id.
If you input "/" once, question sheet number will be set as the number following "/". If you input "/" twice, quiestion sheet number will be next.
If you input "" once, question sheet number will be set as the number following "". If you input "*" twice, quiestion sheet number will be next.
When you type only numbers, the numbers will be sent to cliant server.