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Solve the following problem using Python, implementing the functions described below, one line at a time
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Description:
 def _concat_ixes(prefix, list, suffix, env):
 """ Creates a new list from 'list' by concatenating the 'prefix' and 'suffix' arguments onto each element of the list. A trailing space on 'prefix' or leading space on 'suffix' will cause them to be put into separate list elements rather than being concatenated. """


    result = []

    # ensure that prefix and suffix are strings
    prefix = str(env.subst(prefix, SCons.Subst.SUBST_RAW))
    suffix = str(env.subst(suffix, SCons.Subst.SUBST_RAW))

    for x in list:
        if isinstance(x, SCons.Node.FS.File):
            result.append(x)
            continue
        x = str(x)
        if x:

            if prefix:
                if prefix[-1] == ' ':
                    result.append(prefix[:-1])
                elif x[:len(prefix)] != prefix:
                    x = prefix + x

            result.append(x)

            if suffix:
                if suffix[0] == ' ':
                    result.append(suffix[1:])
                elif x[-len(suffix):] != suffix:
                    result[-1] = result[-1]+suffix

    return result