C1111233133313231133133313331333131211111331121211113313231323232311   >>    C111123313331323113313331333133313121111133112121111331323132323231   <<    C1111233133313231133133313331333131211111331121211113313231323232313   >>      C1111233133313231133133313331333131211111331121211113313231323232312   >>