C312312111111331312111133133313331333133322331333133313311233112323131   >>    C31231211111133131211113313331333133313332233133313331331123311232313   <<    C312312111111331312111133133313331333133322331333133313311233112323133   >>      C312312111111331312111133133313331333133322331333133313311233112323132   >>