Mamas sih bolak+balik bolak+balik
mamas sih bolak balik bolak balik .
m a m a s WORD_BOUNDARY s i h WORD_BOUNDARY b o l a k WORD_BOUNDARY b a l i k WORD_BOUNDARY b o l a k WORD_BOUNDARY b a l i k WORD_BOUNDARY
m a m a s WORD_BOUNDARY s i h WORD_BOUNDARY b o l a k WORD_BOUNDARY b a l i k WORD_BOUNDARY b o l a k WORD_BOUNDARY b a l i k WORD_BOUNDARY . WORD_BOUNDARY