I know AC solution that answers 5 on this test instead of 3:
/////////////start of test
6






////////////end of test

6
[1 space]
[1 space]
[2 spaces]
[2 spaces]
[3 spaces]
[3 spaces]
[EOF]

Also this test should be answered 0 instead of 1.
2
 MEXX
MEXX

I gues this tests suit the condition "The brands are the strings of Latin letters and blanks." and may be added.

Thank you.