B3313221211233132322331321123233313231333132233133313331333132213112121   >>    B331322121123313232233132112323331323133313223313331333133313221311212   <<    B3313221211233132322331321123233313231333132233133313331333132213112123   >>      B3313221211233132322331321123233313231333132233133313331333132213112122   >>