Not sure why this isn’t working can someone help. It doesn’t show any error message.

```
# This function finds the pair of units
# with the minimum distance between them.
def findNearestPair(units):
minDistance = 9001
nearestPair = ["Nobody", "Nobody"]
# You need to check and compare all pairs of units.
# Iterate all units with indexes "i" from 0 to "len(units)".
for i in range(len(units)):
# Iterate all units again with indexes "j".
for j in range(len(units)):
# If "i" is equal to "j", then skip (continue).
if i == j:
continue
i = units[i]
j = units[j]
# Find the distance between the i-th and j-th units.
d = i.distanceTo(j)
# If the distance less than 'minDistance':
if d < minDistance:
minDistance = d
# Reassign 'nearestPair' to the id's
# of the current pair of units.
nearestPair = [i.id, j.id]
return nearestPair
while True:
soldiers = hero.findByType("soldier")
# We know when the cannon shoots.
if hero.time % 8 == 5:
# Find which pair of soldiers in danger and protect them.
pairOfNames = findNearestPair(soldiers)
# Say the soldier's names and wizards will protect them.
hero.say(pairOfNames[0] + " " + pairOfNames[1])
```