fix

app.py

@@ -73,8 +73,8 @@ def validate(seq):
     leftover = set(seq.upper()) - alphabet
     return not leftover
 
-def pred_seq(seq):
-    seq = seq.upper()
+def pred_seq(h_seq, l_seq):
+    seq = h_seq.upper()
     is_valid = validate(seq)
     if is_valid:    
         sequences = {