C11111211113313112113313331333133313331333133213331333132323321   >>    C1111121111331311211331333133313331333133313321333133313232332   <<    C11111211113313112113313331333133313331333133213331333132323323   >>      C11111211113313112113313331333133313331333133213331333132323322   >>