def format$\_$address$($address$\_$string$)$:

house$\_$number $=""$

street$\_$name $=""$

# Separate the house number from the street name.

address$\_$parts $=\_\_\_$

for address$\_$part in address$\_$parts:

# Complete the if$-$statement with a string method.

if $\_\_\_$

house$\_$number $=$ address$\_$part

else:

street$\_$name $+=$ address$\_$part $+""$

# Remove the extra space at the end of the last "street$\_$name".

street$\_$name $=\_\_\_$

# Use a string method to return the required formatted string.

return $\_\_\_$

print$($format$\_$address$("123$ Main Street"$))$

# Should print: "House number $123$ on a street named Main Street"

print$($format$\_$address$("10011$st Ave"$))$

# Should print: "House number $1001$ on a street named $1$st Ave"

print$($format$\_$address$("55$ North Center Drive"$))$

# Should print "House number $55$ on a street named North Center Drive"