C11112331333132311331333133313331333132311213331333133313233321   >>    C1111233133313231133133313331333133313231121333133313331323332   <<    C11112331333132311331333133313331333132311213331333133313233323   >>      C11112331333132311331333133313331333132311213331333133313233322   >>