C1111233133313231133133313331333133311221123121111331333132313222321   >>    C111123313331323113313331333133313331122112312111133133313231322232   <<    C1111233133313231133133313331333133311221123121111331333132313222323   >>      C1111233133313231133133313331333133311221123121111331333132313222322   >>