C1111233131211111211113313331333131133132321233133313231323211311   >>    C111123313121111121111331333133313113313232123313331323132321131   <<    C1111233131211111211113313331333131133132321233133313231323211313   >>      C1111233131211111211113313331333131133132321233133313231323211312   >>