C1111233131211111211113313331333133313331333131211113313311211113313223313221   >>    C111123313121111121111331333133313331333133313121111331331121111331322331322   <<    C1111233131211111211113313331333133313331333131211113313311211113313223313223   >>      C1111233131211111211113313331333133313331333131211113313311211113313223313222   >>