Four doubles are read from input, where the first two doubles are the working hours and vacation hours of punchCard$1$ and the second two doubles are the working hours and vacation hours of punchCard$2.$ Complete the function to overload the $-$ operator.

Ex: If the input is $11\mathrm{.}010\mathrm{.}02\mathrm{.}06\mathrm{.}0,$ then the output is:

$11$ working hours, $10$ vacation hours $2$ working hours, $6$ vacation hours Difference: $9$ working hours, $4$ vacation hours

Note: The difference of two time cards is:

the difference of the number of working hours

the difference of the number of vacation hours