Let L$1,$ L$2$ are objects of the list class, with the following values

$L1$: $12345$

$L2$: $1020304050$

we send them to the function FF

void FF$($List$L1$:$12345$

$L2$:$102030405054321L2$:$102030405054321L2$:$102030405012345L1$:$12345L2$:$102030405012345$