C1111233131211111211113313331323133313231333133313232233133312311   >>    C111123313121111121111331333132313331323133313331323223313331231   <<    C1111233131211111211113313331323133313231333133313232233133312313   >>      C1111233131211111211113313331323133313231333133313232233133312312   >>