C131121333133313233213331333133313331333133313231333133311132311211   >>    C13112133313331323321333133313331333133313331323133313331113231121   <<    C131121333133313233213331333133313331333133313231333133311132311213   >>      C131121333133313233213331333133313331333133313231333133311132311212   >>