<SYSTEM_TASK:>
Solve the following problem using Python, implementing the functions described below, one line at a time
<END_TASK>
<USER_TASK:>
Description:
 def transform (list, pattern, indices = [1]):
 """ Matches all elements of 'list' agains the 'pattern' and returns a list of the elements indicated by indices of all successfull matches. If 'indices' is omitted returns a list of first paranthethised groups of all successfull matches. """

    result = []

    for e in list:
        m = re.match (pattern, e)

        if m:
            for i in indices:
                result.append (m.group (i))

    return result