In the 60s there was a table for testing one's powers of observation. Its
name was the "Entertaining table". Find on the table the number sequence from 1 to 90 inclusive.

If you can find these numbers in:
* 5-10 minutes, you have exceptional powers of observation
* 10-15 minutes - good * 15-20 minutes - average
* 20-25 minutes - satisfactory powers of observation

There are 3 game modes:
* 1 minute, * unlimited time, *10 seconds per move