C1111233131211111211113313331333133313331312331333131211113323221221   >>    C111123313121111121111331333133313331333131233133313121111332322122   <<    C1111233131211111211113313331333133313331312331333131211113323221223   >>      C1111233131211111211113313331333133313331312331333131211113323221222   >>