C1111233133313231133133313331333133313231312111133133313111231211   >>    C111123313331323113313331333133313331323131211113313331311123121   <<    C1111233133313231133133313331333133313231312111133133313111231213   >>      C1111233133313231133133313331333133313231312111133133313111231212   >>