B3313221211233132322331321123233313231333132233133313331333132312311321   >>    B331322121123313232233132112323331323133313223313331333133313231231132   <<    B3313221211233132322331321123233313231333132233133313331333132312311323   >>      B3313221211233132322331321123233313231333132233133313331333132312311322   >>