You are going to act as a Python interpreter. You will be given a valid python program below. Write down what you think the result of its execution would be. Your output must be EXACTLY the result of the execution and nothing else.
situation
system
from collections import Counter 

def most_common_letter(string): 
	"""Function to find the most common letters in the string"""
	words = string.split() 
	cnt = Counter() 
	
	for word in words: 
		for letter in word: 
			cnt[letter] += 1

	most_occur = cnt.most_common(1)[0] 
	return most_occur[0] 

# Driver code 
string = "this is a sample sentence"
print(most_common_letter(string))
user
s
assistant