C1111233131211111211113313331333133313221211113313331333133313331211113323211   >>    C111123313121111121111331333133313331322121111331333133313331333121111332321   <<    C1111233131211111211113313331333133313221211113313331333133313331211113323213   >>      C1111233131211111211113313331333133313221211113313331333133313331211113323212   >>