biglist = [['Bob', 10], ['Karl', 12], ['Judy', 11]]
customsort(biglist) 
Should return this:
biglist = [['Bob', 10],  ['Judy', 11], ['Karl', 12]]
biglist = [['Bob', 10], ['Karl', 12], ['Judy', 11]]
customsort(biglist) 
Should return this:
biglist = [['Bob', 10],  ['Judy', 11], ['Karl', 12]]
 
    
    >>> biglist = [['Bob', 10], ['Karl', 12], ['Judy', 11]]
>>> sorted(biglist, key=lambda x:x[1])
[['Bob', 10], ['Judy', 11], ['Karl', 12]]
