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script latn {
  feature ContextualAlternates;
}

class @hightail [b o q v w b.high o.high q.high v.high w.high b.init o.init q.init v.init w.init];
class @lowercase [a b c d e f g h i j k l m n o p q r s t u v w x y z];
class @lowercasehigh [a.high b.high c.high d.high e.high f.high g.high h.high i.high j.high k.high l.high m.high n.high o.high p.high q.high r.high s.high t.high u.high v.high w.high x.high y.high z.high];
class @lowercaseinit [a.init b.init c.init d.init e.init f.init g.init h.init i.init j.init k.init l.init m.init n.init o.init p.init q.init r.init s.init t.init u.init v.init w.init x.init y.init z.init];
class @lowercasefina [a.fina b.fina c.fina d.fina e.fina f.fina g.fina h.fina i.fina j.fina k.fina l.fina m.fina n.fina o.fina p.fina q.fina r.fina s.fina t.fina u.fina v.fina w.fina x.fina y.fina z.fina];
class @lowercase_all [A B C D E F G H I J K L M N O P Q R S T U V W X Y Z a b c d e f g h i j k l m n o p q r s t u v w x y z a.high b.high c.high d.high e.high f.high g.high h.high i.high j.high k.high l.high m.high n.high o.high p.high q.high r.high s.high t.high u.high v.high w.high x.high y.high z.high a.init b.init c.init d.init e.init f.init g.init h.init i.init j.init k.init l.init m.init n.init o.init p.init q.init r.init s.init t.init u.init v.init w.init x.init y.init z.init a.fina b.fina c.fina d.fina e.fina f.fina g.fina h.fina i.fina j.fina k.fina l.fina m.fina n.fina o.fina p.fina q.fina r.fina s.fina t.fina u.fina v.fina w.fina x.fina y.fina z.fina];

feature ContextualAlternates calt {
  lookup ChainingContextInit;
  lookup ChainingContextFina;
  lookup ChainingContextBetween;
  lookup ChainingContextHighTail;
}

lookup ChainingContextBetween {
  context (@lowercase_all) @lowercaseinit (@lowercase_all);
  sub 0 SingleSubstitutionInitToNormal;
}

lookup ChainingContextFina {
  context (@lowercase_all) @lowercase;
  sub 0 SingleSubstitutionFina;
}

lookup ChainingContextHighTail {
  context (@hightail) @lowercase;
  sub 0 SingleSubstitutionHighTail;
}

lookup ChainingContextInit {
  context @lowercase (@lowercase);
  sub 0 SingleSubstitutionInit;
}

lookup SingleSubstitutionFina {
  sub @lowercase -> @lowercasefina;
}

lookup SingleSubstitutionHighTail {
  sub @lowercase -> @lowercasehigh;
}

lookup SingleSubstitutionInit {
  sub @lowercase -> @lowercaseinit;
}

lookup SingleSubstitutionInitToNormal {
  sub @lowercaseinit -> @lowercase;
}