str = re.sub ('(paper_[a-z]+)', regularize_paper, str)
str = re.sub ('sustainup', 'sustainUp', str)
+ str = re.sub ('nobreak', 'noBreak', str)
str = re.sub ('sustaindown', 'sustainDown', str)
str = re.sub ('sostenutoup', 'sostenutoUp', str)
str = re.sub ('sostenutodown', 'sostenutoDown', str)