C1111233133313231133133313331333133311221123121111113313113313121213321   >>    C111123313331323113313331333133313331122112312111111331311331312121332   <<    C1111233133313231133133313331333133311221123121111113313113313121213323   >>      C1111233133313231133133313331333133311221123121111113313113313121213322   >>