numbers = [1,6,3,4,7,5,6,7,8,9]
numbers.sort()
unique = []
for i in numbers:
    if i not in unique:
        unique.append(i)
print (unique)
numbers = [1,6,3,4,7,5,6,7,8,9]
numbers.sort()
unique = []
for i in numbers:
    if i not in unique:
        unique.append(i)
print (unique)