include(langs.fea);
include(classes2.fea);

feature calt {
    lookup calt1 {
        sub @a1 @a1' by @a2;
        sub @a2 @a1' by @a3;
        sub @a3 @a1' by @a4;
        sub @a4 @a1' by @a5;
        sub @a5 @a1' by @a6;
        sub @a6 @a1' by @a7;
        sub @a7 @a1' by @a8;
        sub @a8 @a1' by @a9;
    } calt1;
} calt;