anchor.diff:     for i in range(0, len(numbers) - 1):
         for k in range(i + 1, len(numbers)):
            if numbers[i] + numbers[k] == target:
  -            return [i, k]
  +            return [i + 1, k + 1]
      return [None, None]
   ----
   
  
positive.code:       elif current_sum < target:
           left += 1
        else
           return [left, right]
     return [None, None]
  ----
  
  
negative.code:       for k in range(i + 1, len(numbers)):
           current_sum = 0
           if current_sum == target:
              return [i + 1, k + 1]
           elif current_sum > target:
              break
           else:
  