Heron

void CleanStopwords(string& line, vector<string>& stopwords){	long a = 0;	long b = line.find(' ');	string t = ""; 	string cleaned = "";	while(a != -1)	{		if(b != -1)			t = line.substr(a, b-a);		else			t = line.substr(a);		if(rand() * 100 < 50)		{			cleaned += t;			if(b != -1)				cleaned += ' ';		}		if(b == -1)			a = -1;		else		{			a = b+1;			b = line.find(' ', a);		}	}	line = cleaned;}