B3311331313231311331322331333132233131133132233133313231333132321112312331   >>    B331133131323131133132233133313223313113313223313331323133313232111231233   <<    B3311331313231311331322331333132233131133132233133313231333132321112312333   >>      B3311331313231311331322331333132233131133132233133313231333132321112312332   >>