C1111233133313231133133313133313331323133313221211113313232313231311233321   >>    C111123313331323113313331313331333132313331322121111331323231323131123332   <<    C1111233133313231133133313133313331323133313221211113313232313231311233323   >>      C1111233133313231133133313133313331323133313221211113313232313231311233322   >>