diff --git a/210CT/Assignment/3interface.py b/210CT/Assignment/3interface.py
index a9fe9aa..a334b18 100644
--- a/210CT/Assignment/3interface.py
+++ b/210CT/Assignment/3interface.py
@@ -1,53 +1,57 @@
 gs = __import__("3graphStructure")
 
-print("\nLeave blank to stop.")
-vertices = [] 
-while True:
-    node = input("Vertice: ") 
-    if node == "":
-        break
-    else: vertices.append(int(node))
-        
-print("\nPlease provide adjacent nodes for these vertices. Once for every connection.")
-edgePairs = [] 
+if input("Predetermined graph? ") != "yes":
+    print("\nLeave blank to stop.")
+    vertices = [] 
+    while True:
+        node = input("Vertice: ") 
+        if node == "":
+            break
+        else: vertices.append(int(node))
 
-for node in vertices:    
-    print(str(node) + ": ", end=" ")
-    edge = input()
-    for element in edge.split(","):
-        if element != "":
-            edgePairs.append((int(element),node,0))
+    print("\nPlease provide adjacent nodes for these vertices. Once for every connection.")
+    edgePairs = [] 
 
-graph = gs.GraphStructure(vertices, edgePairs)
+    for node in vertices:    
+        print(str(node) + ": ", end=" ")
+        edge = input()
+        for element in edge.split(","):
+            if element != "":
+                edgePairs.append((int(element),node,0))
 
+    graph = gs.GraphStructure(vertices, edgePairs)
+else:
+    graph = gs.GraphStructure([6, 7, 8, 9, 10, 11, 12, 13, 21, 24], [(6,7,2), (7,21,1), (21,24,1), (6,9,5), (6,8,2), (8,12,2), (12,9,3), (9,11,2), (9,10,2), (12,13,4)])   
+    
 while True:
     try: choice = int(input("\n1.isPath()\n2.isGraphConnected()\n3.BFS\n4.DFS\n5.Dijkstra\n6.Exit\nChoice: "))
     except: print("\n\nWe don't recognize your choice.\n"); continue
-    
-    if choice == 6:break 
-    elif choice == 1:
-        userInput = input("\nGive two vertices as such: x,y\n").split(",")
-        result = graph.isPath(int(userInput[0]), int(userInput[1]))
-        print("\nAre they connected? " + str(result[0]))
-        if len(result) > 1:
-            print("Path: " + str(result[1]))
-        input()
-    elif choice == 2:   
-        print("\nIs the graph connected?")
-        print(graph.isConnected())
-        input()
-    elif choice == 3:
-        node = int(input("\nAt which node do you want to start? "))
-        print("This is Breadth First Traversal: ")
-        print(graph.traverseBreadthFirst(node))
-        input()
-    elif choice == 4:
-        node = int(input("\nAt which node do you want to start? "))
-        print("This is Depth First Traversal:")
-        print(graph.traverseDepthFirst(node))
-        input()
-    elif choice ==5:
-        userInput = input("\nGive two vertices as such: x,y\n").split(",")
-        result = graph.findDijkstra(int(userInput[0]), int(userInput[1]))
-        print("This is the path: " + str(result)) 
-        input()    
\ No newline at end of file
+    try:
+        if choice == 6:break 
+        elif choice == 1:
+            userInput = input("\nGive two vertices as such: x,y\n").split(",")
+            result = graph.isPath(int(userInput[0]), int(userInput[1]))
+            print("\nAre they connected? " + str(result[0]))
+            if len(result) > 1:
+                print("Path: " + str(result[1]))
+            input()
+        elif choice == 2:   
+            print("\nIs the graph connected?")
+            print(graph.isConnected())
+            input()
+        elif choice == 3:
+            node = int(input("\nAt which node do you want to start? "))
+            print("This is Breadth First Traversal: ")
+            print(graph.traverseBreadthFirst(node))
+            input()
+        elif choice == 4:
+            node = int(input("\nAt which node do you want to start? "))
+            print("This is Depth First Traversal:")
+            print(graph.traverseDepthFirst(node))
+            input()
+        elif choice ==5:
+            userInput = input("\nGive two vertices as such: x,y\n").split(",")
+            result = graph.findDijkstra(int(userInput[0]), int(userInput[1]))
+            print("This is the path: " + str(result)) 
+            input()    
+    except: print("Wrong input.")
\ No newline at end of file