5b)
def uniqueUpdate(data1, data2):
# Initially empty dictionary
dupKeys = {}

# Examine every (k, v2) pair in data2
for [k, v2] in data2:
    # Check if there is a key-value
    # pair with key = k in data1
    if k in data1:
        v1 = data1[k]
        # (k, v1) in dict1
        # Check if v1 != v2
        if v1 != v2:
            # Add (k, [v1, v2])
            # to dictionary                
            dupKeys[k] = [v1, v2]
            # Remove (k, v1) from data1
            del data1[k]
    else:
        # Add (k, v2) to data1
        data1[k] = v2
# After processing all (k, v2) in
# data2, return the dictionary
return dupKeys

5c)
   test case1:
   4
   1 2
   3 3 
   3 8
   4 9
   
   2
   3 3 
   4 4
   test case 2:
   4
   1 2 
   2 2 
   3 3
   4 19
   
   2 
   3 3
   4 19