C1111233133313231133133313331333133313231312111133133313222122313232111   >>    C111123313331323113313331333133313331323131211113313331322212231323211   <<    C1111233133313231133133313331333133313231312111133133313222122313232113   >>      C1111233133313231133133313331333133313231312111133133313222122313232112   >>