diff --git a/asd.pl b/asd.pl
index d20e764..d038f41 100644
--- a/asd.pl
+++ b/asd.pl
@@ -144,4 +144,31 @@ suggest(Symptoms, Answer) :-
     
 suggest(Symptoms, Answer) :- 
     checkForDiseaseWeak(Symptoms, 'atrial fibrillation'),
-    Answer = "The patients disease might be atrial fibrillation.".
\ No newline at end of file
+    Answer = "The patients disease might be atrial fibrillation.".
+	
+% interprete input
+
+interpret(Input, Symptoms) :-
+split_string(Input, ".", " ", Splited),
+iterate(Splited,A),
+flatten(A, Symptoms).
+
+	envelop([X], [Z]):- 
+Z=(X).
+
+envelop([X|Xs], [Z|Zs]) :- 
+Z=(X),
+envelop(Xs,Zs).
+
+iterate([_], []).
+
+
+iterate([X|Xs], [Z|WithoutLast]) :- 
+	(sub_string(X,_,_,_,'Patient has ')->string_length(X,AA),L is AA-12, sub_string(X,12,L,_,AAA), split_string(AAA, ",", " ", AAAA),envelop(AAAA,Z);
+	(sub_string(X,_,_,_,'Patient ')->string_length(X,AA),L is AA-8, sub_string(X,8,L,_,AAA), split_string(AAA, ",", " ", AAAA),envelop(AAAA,Z);
+	(sub_string(X,_,_,_,'Patients erythrocyte level is ')->string_length(X,AA),L is AA-30, sub_string(X,30,L,_,AAA), re_replace(",",".",AAA,AAAA), number_string(VAL,AAAA), (VAL>4.2->(VAL>5.4->Z=('erythrocyte',1);Z=('erythrocyte',0));Z=[('erythrocyte',-1)]);
+	(sub_string(X,_,_,_,'Patients temperature is ')->string_length(X,AA), sub_string(X,24,4,_,AAA), re_replace(",",".",AAA,AAAA), number_string(VAL,AAAA), (VAL>37.0->(VAL>38.0->Z=('fever',2);Z=('fever',1));Z=[('fever',0)]);
+	(sub_string(X,_,_,_,'Patients ')->string_length(X,AA),L is AA-15, sub_string(X,9,L,_,AAA), split_string(AAA, ",", " ", AAAA), Z=[('pain',AAAA)];Z='cannot interprete'))))),
+    iterate(Xs, WithoutLast).
+
+