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Python

# Natural Language Toolkit: Stemmer Utilities
#
# Copyright (C) 2001-2019 NLTK Project
# Author: Helder <he7d3r@gmail.com>
# URL: <http://nltk.org/>
# For license information, see LICENSE.TXT
def suffix_replace(original, old, new):
"""
Replaces the old suffix of the original string by a new suffix
"""
return original[: -len(old)] + new
def prefix_replace(original, old, new):
"""
Replaces the old prefix of the original string by a new suffix
:param original: string
:param old: string
:param new: string
:return: string
"""
return new + original[len(old) :]