53.
What will be the output of the following Python code?
import re
s = 'abc123 xyz666 lmn-11 def77'
re.sub(r'\b([a-z]+)(\d+)', r'\2\1:', s)

55.
How can you replace a matched pattern with a new string using regular expressions in Python?

57.
How can you match zero or more occurrences of a pattern in regular expressions?

58.
What will be the output of the following Python code?
re.split(r'(n\d)=', 'n1=3.1, n2=5, n3=4.565')

60.
What will be the output of the following code:
import re
result = re.findall(r'd{1,3}', 'There are 25 apples and 300 oranges.')
print(result)