C11112331312111112111133132313331333133313233313331312111133313221   >>    C1111233131211111211113313231333133313331323331333131211113331322   <<    C11112331312111112111133132313331333133313233313331312111133313223   >>      C11112331312111112111133132313331333133313233313331312111133313222   >>