B3311331313231311331322331333132233131133132233133313231333132212111112312321   >>    B331133131323131133132233133313223313113313223313331323133313221211111231232   <<    B3311331313231311331322331333132233131133132233133313231333132212111112312323   >>      B3311331313231311331322331333132233131133132233133313231333132212111112312322   >>