cac ban oiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiiii !
1 + 1 = bnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnnn zay
222222222222222222222222222222222 bnnnnnnnnnnnnnnnnnnnnnnnn
1 + 1 = 2 nha bn