C11112331312111112111133133313331333133112111113331333133313331333132313222131   >>    C1111233131211111211113313331333133313311211111333133313331333133313231322213   <<    C11112331312111112111133133313331333133112111113331333133313331333132313222133   >>      C11112331312111112111133133313331333133112111113331333133313331333132313222132   >>