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//
//
//
#include <iostream>
using namespace std;
int main ()
{
char ch;
int counter = 0;
cin.get(ch);
while (cin)
{ if ( ch == '2' )
counter = counter + 1;
cin.get(ch);
}
cout << "The # of 2s in the file is: " << counter << endl;
return 0;
}