(KW).(PF)?(PT)=
(KW).(PF)?(PT)= site:(DE)
(KW).(PF)?(PT)=(NB)
(KW).(PF)?(PT)=(NB) site:(DE)
(SF) ".(DE)" + "(KW)"
(SF)(KW).(PF)?(PT)=
(SF)(KW).(PF)?(PT)= site:(DE)
(SF)(PT)=(KW).(PF)? site:(DE)
(SF)(KW).(PF)?(PT)=(NB)
(SF)(KW).(PF)?(PT)=(NB) site:(DE)
(SF)"(KW)" + "(DE)".(PF)?(PT)=
(SF)"(KW)" + "(DE)".(PF)?(PT)=(NB)
.(PF)?(PT)= "(KW)"
(PT)= "(KW)" + ".(DE)"

=  SF
2 = pt
3 = pf
5=nb
scource = kw
str2.Remove(0, 1) = de