B3311331313231311331322331333132313331322331323133313311211111232233112121   >>    B331133131323131133132233133313231333132233132313331331121111123223311212   <<    B3311331313231311331322331333132313331322331323133313311211111232233112123   >>      B3311331313231311331322331333132313331322331323133313311211111232233112122   >>