input: def computeEditDistance(string1: str, string2: str) -> int:
      """ Compute the edit distance between two given strings.
      >>> computeEditDistance("kitten", "sitting")
      3
      """
output:     if len(string1) == 0:
          return len(string2)
      if len(string2) == 0:
          return len(string1)
      
      dp = [[0] * (len(string2) + 1) for _ in range(len(string1) + 1)]
      
      for i in range(len(string1) + 1):
          dp[i][0] = i
      for j in range(len(string2) + 1):
          dp[0][j] = j
      
      for i in range(1, len(string1) + 1):
          for j in range(1, len(string2) + 1):
              if string1[i - 1] == string2[j - 1]:
                  dp[i][j] = dp[i - 1][j - 1]
              else:
                  dp[i][j] = min(dp[i - 1][j], dp[i][j - 1], dp[i - 1][j - 1]) + 1
      
      return dp[len(string1)][len(string2)]