In Mathematica, passing a long list of arguments to a function might be tedious enough.

The function Sequence simplifies this procedure. Here is an example.

f[ Sequence @@ argumentlist1, argument0 , Sequence @@ argumentlist2 ]/.{argumentlist1 -> {a1,b1,c1,d1,e1,f1}, argumentlist2-> {a2,b2,c2,d2}}

The result of it would be

f[a1,b1,c1,d1,e1,f1, argument0, a2,b2,c2,d2]