def punyaHuruf(kataPertama, kataKedua):
set_kata_pertama = set(kataPertama.lower())
set_kata_kedua = set(kataKedua.lower())
return set_kata_pertama.issubset(set_kata_kedua)
print(f"punyaHuruf('cat', 'antarctica') → {punyaHuruf('cat', 'antarctica')}")
print(f"punyaHuruf('cat', 'australia') → {punyaHuruf('cat', 'australia')}")
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