Complex form

Hi I have a quite specific request and would like to know if wpform can accomplish it

I have page with a form made by 2 text fields where user will insert 2 strings

Once he submits he will redirected to one of the 3 pages according to the sum of the length of 2 strings and it will carry in the URL the length

for instance
http://www.mysite.com/pag1?Str_Len=2 if sum <=4
http://www.mysite.com/pag1?Str_Len=5 if sum <4<8
http://www.mysite.com/pag1?Str_Len=12 if sum >=8

Is it something possible?