Bagaimana Facebook Mencari Mutual Friends Kita?

(Brahm Elsa) -> [Annya, Chieya, Dipa, Elsa]

For map(Chieya -> [Annya, Brahm, Dipa, Elsa]), hasilnya:

(Annya Chieya) ->[Annya, Brahm, Dipa, Elsa]

(Brahm Chieya) ->[Annya, Brahm, Dipa, Elsa]

(Chieya Dipa) ->[Annya, Brahm, Dipa, Elsa]

(Chieya Elsa) ->[Annya, Brahm, Dipa, Elsa]

For map(Dipa ->[Annya, Brahm, Chieya, Elsa]), hasilnya:

(Annya Dipa) ->[Annya, Brahm, Chieya, Elsa]

(Brahm Dipa) ->[Annya, Brahm, Chieya, Elsa]