#include <iostream>
using namespace std;

int main() {

	int intNum = 0;
    int digit;
	
	cin >> intNum;
    
    cout << "last: " << intNum % 10;
    
    do {      
          digit = intNum % 10;
    } while ( intNum /= 10 );
    cout << ", first: " << digit;

	return 0;

}