B3313221211233132322331321123233313231333132233133313331323132313112123311   >>    B331322121123313232233132112323331323133313223313331333132313231311212331   <<    B3313221211233132322331321123233313231333132233133313331323132313112123313   >>      B3313221211233132322331321123233313231333132233133313331323132313112123312   >>