C312312111111331312111133133313331333133322331333133311232212323321   >>    C31231211111133131211113313331333133313332233133313331123221232332   <<    C312312111111331312111133133313331333133322331333133311232212323323   >>      C312312111111331312111133133313331333133322331333133311232212323322   >>