print("0: ");
const dupa0 = (() => {
print(typeof dupa0);
})()
print("0: a teraz: ");
print(typeof dupa0);
print("1: ");
const dupa = ((arg) => {
print(typeof arg);
})(dupa)
print("1: a teraz: ");
print(typeof dupa);
print("2: ");
const dupa2 = ((arg) => {
print(typeof arg);
return 0
})(dupa2)
print("2: a teraz: ");
print(typeof dupa2);
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