Update app.py

app.py

@@ -76,7 +76,7 @@ def sort_doc(in_list,steps_in=0,control=None):
             print(f'{ea_dig} :: {list(control_json["control"][ea_dig])[0]}')
             step_cont_box.append(int(list(control_json["control"][ea_dig])[0]))
             print(step_cont_box)
-        cnt=int(last_key[-1]+1)
+        cnt=int(last_key[-1])+1
     if not lod:
         print("NOT LOD")
         for ii in range(steps):