C11112331333132311331333133313331323132313331211111211111333131133133313221   >>    C1111233133313231133133313331333132313231333121111121111133313113313331322   <<    C11112331333132311331333133313331323132313331211111211111333131133133313223   >>      C11112331333132311331333133313331323132313331211111211111333131133133313222   >>