#include <string>
#include <iostream>
using namespace std;
int main() {
	string line, alpha = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ";
	size_t i;

	for ( ; getline( cin, line ); ) {
		for ( ;; ) {									// scan words off line
			string::size_type posn = line.find_first_of( alpha );// find position of 1st alphabetic character
		  if ( posn == string::npos ) break;			// any characters left ?
			line = line.substr( posn );					// remove leading whitespace
			posn = line.find_first_not_of( alpha );		// find position of 1st non-alphabetic character
			if ( posn != string::npos ) {
				cout << line.substr( 0, posn ) << endl;	// extract word from start of line
				line = line.substr( posn );				// delete word from line
			} else {
				cout << line << endl;					// extract word from start of line
				line = "";
			}
		} // for
	} // for
}