$4\mathrm{.}3$ Suppose the input data are entered as follows:

$\backslash$table$[[10,20],[30,40],[50,60],[70,80]]$

Description

The input statements that read it are

cin$abc$;

cin$de$;

cin$ab$;

Description

What are the contents of the variables $a,b,c,d,e,$ and $f$ after the statements have executed?