C3132121111133313233121111331333133313331333133313331333133313112211231221   >>    C313212111113331323312111133133313331333133313331333133313331311221123122   <<    C3132121111133313233121111331333133313331333133313331333133313112211231223   >>      C3132121111133313233121111331333133313331333133313331333133313112211231222   >>