C1111233131211111211113313331333133313232321333133313331333131121121311223231   >>    C111123313121111121111331333133313331323232133313331333133313112112131122323   <<    C1111233131211111211113313331333133313232321333133313331333131121121311223233   >>      C1111233131211111211113313331333133313232321333133313331333131121121311223232   >>