C11112331312111112111133132313331333133313233313331311213332233111   >>    C1111233131211111211113313231333133313331323331333131121333223311   <<    C11112331312111112111133132313331333133313233313331311213332233113   >>      C11112331312111112111133132313331333133313233313331311213332233112   >>