C11112331312111112111133132313331333133313233313331333133322232321333132313221   >>    C1111233131211111211113313231333133313331323331333133313332223232133313231322   <<    C11112331312111112111133132313331333133313233313331333133322232321333132313223   >>      C11112331312111112111133132313331333133313233313331333133322232321333132313222   >>