C1111233133313231133133313331333133313231312111133133313232321321232121   >>    C111123313331323113313331333133313331323131211113313331323232132123212   <<    C1111233133313231133133313331333133313231312111133133313232321321232123   >>      C1111233133313231133133313331333133313231312111133133313232321321232122   >>