lookup ArabicDigits {
    lookupflag 0 ;
	sub zero  by uni0660 ;
	sub one   by uni0661 ;
	sub two   by uni0662 ;
	sub three by uni0663 ;
	sub four  by uni0664 ;
	sub five  by uni0665 ;
	sub six   by uni0666 ;
	sub seven by uni0667 ;
	sub eight by uni0668 ;
	sub nine  by uni0669 ;
} ArabicDigits ;

feature ardi {
    script arab ;
        language dflt ;
            lookup ArabicDigits ;
} ardi ;