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
def find_lcs(str1, str2):
 # create a matrix to store solutions to subproblems 
 dp = [[0 for j in range(len(str2) + 1)] for i in range(len(str1) + 1)]

 # fill the lookup table in bottom-up manner
 for i in range(1, len(str1) + 1):
  for j in range(1, len(str2) + 1):
   if str1[i-1] == str2[j-1]:
    dp[i][j] = 1 + dp[i-1][j-1]
   else:
    dp[i][j] = max(dp[i][j-1], dp[i-1][j])
 
 # find the longest common sub sequence
 i, j = len(str1), len(str2)
 lcs = ""
 while i > 0 and j > 0:
  if str1[i-1] == str2[j-1]:
   lcs += str1[i-1]
   i-=1
   j-=1
  elif dp[i][j-1] > dp[i-1][j]:
   j-=1
  else:
   i-=1
 
 # Reverse the lcs string 
 return lcs[::-1]

str1 = "ACBA"
str2 = "ABAC"

print(find_lcs(str1, str2))


user
ABA
assistant