// copyright 1999 Brian J. Reithel, Ph.D.

#define LIMIT 4

int main() {
	int numbers[LIMIT];
	int holder;
	int outer, inner;
	char nl;

	for(outer=0;outer<LIMIT;outer++) {
		cin >> numbers[outer];
		cin.get(nl);
	}

	for(outer=0;outer<LIMIT-1;outer++){
		for(inner=outer+1;inner<LIMIT;inner++){
			if(numbers[outer]>numbers[inner]{
				holder=numbers[outer];
				numbers[outer]=numbers[inner];
				numbers[inner]=holder;
			}
		}
	}

	for(outer=0;outer<LIMIT;outer++)
		cout << numbers[outer] << endl;

}