preg_match help please

[EdwardC1932]

\[code\]preg_match_all('/[\s]{1}(AA|BB|CC)+[\s]{1}/',' AA BB ',$matches);\[/code\]result is \[code\]AA\[/code\], but I need \[code\]AA\[/code\] and \[code\]BB\[/code\].