<s> """<STR_LIT>""" <EOL> class Sequence ( int ) : <EOL> _instance = dict ( ) <EOL> def __new__ ( cls ) : <EOL> cls . _instance [ '<STR_LIT>' ] = cls . _instance . get ( '<STR_LIT>' , <NUM_LIT:0> ) + <NUM_LIT:1> <EOL> return cls . _instance [ '<STR_LIT>' ] </s>
