import java.util.*;

public class ProbSimulator {
	public static void main(String[] args) {
		int count = 0;
		
		for(int die1 = 0; die1 < 6; die1++) {
			for(int die2 = 0; die2 < 6; die2++) {
				for(int die3 = 0; die3 < 6; die3++) {
					for(int die4 = 0; die4 < 6; die4++) {
						for(int die5 = 0; die5 < 6; die5++) {
							for(int die6 = 0; die6 < 6; die6++) {
								HashSet numbersRolled = new HashSet();
								numbersRolled.add(die1);
								numbersRolled.add(die2);
								numbersRolled.add(die3);
								numbersRolled.add(die4);
								numbersRolled.add(die5);
								numbersRolled.add(die6);
								
								if(numbersRolled.size() == 4) {
									count++;
								}
							}
						}
					}
				}
			}
		}
		
		System.out.println(count + " / 46656");
	}
}