C11112331312111112111133133313331333132313233313331311213332233111   >>    C1111233131211111211113313331333133313231323331333131121333223311   <<    C11112331312111112111133133313331333132313233313331311213332233113   >>      C11112331312111112111133133313331333132313233313331311213332233112   >>