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<script> function run() { setTimeout(first); setTimeout(second); setTimeout(third); } function first(x) { let y = 0; var z = 1; debugger; } function second(x) { if (second) { let y = 0; debugger; } } function third(x) { let y = 1; if (y) { let z = 0; var v = 2; debugger; } } </script>