>>> from pensions import no_reach

>>> l = [['1111A', 68, 640, 589, 573],
...     ['2222D', 69, 710, 550, 570, 698, 645, 512],
...     ['3333J', 72, 530, 534],
...     ['4444N', 75, 770, 645, 630, 650, 590, 481, 602]]
>>> no_reach(l, 650)
'2222D'
>>> no_reach(l, 850)
''