fix

app.py

@@ -75,8 +75,10 @@ def validate(seq):
     return not leftover
 
 def pred_seq(h_seq, l_seq):
-    h_seq, l_seq = h_seq.upper(), l_seq.upper()
-    h_is_valid, l_is_valid = validate(h_seq), validate(l_seq)
+    h_seq = h_seq.upper()
+    l_seq = l_seq.upper()
+    h_is_valid = validate(h_seq)
+    l_is_valid = validate(l_seq)
     if h_is_valid and l_is_valid:    
         sequences = {
             "H": h_seq,