aoqi@0: x = undefined
aoqi@0: y = undefined
aoqi@0: z = undefined
aoqi@0: s = undefined
aoqi@0: u = undefined
aoqi@0: r = undefined
aoqi@0: t = undefined
aoqi@0: ReferenceError: "q" is not defined
aoqi@0: b = 10
aoqi@0: ReferenceError: "b" is not defined
aoqi@0: Value of 'a' inside the function 20
aoqi@0: Value of 'a' outside the function 10