C1111233133313231133133313331333133313231312111133131211113313331121221   >>    C111123313331323113313331333133313331323131211113313121111331333112122   <<    C1111233133313231133133313331333133313231312111133131211113313331121223   >>      C1111233133313231133133313331333133313231312111133131211113313331121222   >>