C312312111111331312111133133313331333133322331333133311221123211   >>    C31231211111133131211113313331333133313332233133313331122112321   <<    C312312111111331312111133133313331333133322331333133311221123213   >>      C312312111111331312111133133313331333133322331333133311221123212   >>