This is what I came up with but is there a shorter way of doing this? Trying to make a list out of tuple pairs.
x = [[1, 2], [3, 4], [5, 6]]
list1, list2 = zip(*x)
list1=list1+list2
list1=list(list1)
list1.sort()
outcome is [1, 2, 3, 4, 5, 6]