C1111233131211111211113313331333133313331322322331311221123231231221   >>    C111123313121111121111331333133313331333132232233131122112323123122   <<    C1111233131211111211113313331333133313331322322331311221123231231223   >>      C1111233131211111211113313331333133313331322322331311221123231231222   >>