C1111233131211111211113313331333133313331323223313231333133313231311   >>    C111123313121111121111331333133313331333132322331323133313331323131   <<    C1111233131211111211113313331333133313331323223313231333133313231313   >>      C1111233131211111211113313331333133313331323223313231333133313231312   >>