C312312111111331312111133133313331322331333133313121111332211321   >>    C31231211111133131211113313331333132233133313331312111133221132   <<    C312312111111331312111133133313331322331333133313121111332211323   >>      C312312111111331312111133133313331322331333133313121111332211322   >>