import java.math.BigDecimal; import java.util.Arrays; import java.util.Scanner; public class Demo2 {     public static void main(String[] args) {         Scanner sc = new Scanner(System.in);         while(true){             int n = sc.nextInt();             int s = sc.nextInt();             System.out.println(fun(n, s));         }     }     private static String fun(int n, int s) {         if (s <= n)             return "1";         if (s > 6 * n)             return "0";         long[][] dp = new long[n][s + 1];         for (int i = 0; i < dp[0].length; i++) {             if (i >= 1 && i <= 6)                 dp[0][i] = 1;         }         for (int i = 1; i < dp.length; i++) {             for (int j = 0; j < dp[0].length; j++) {                 for (int mm = 1; j - mm > 0&&mm<=6; mm++) {                     dp[i][j] += dp[i - 1][j - mm];                 }             }         }         for (int i = 0; i < dp.length; i++) {             System.out.println(Arrays.toString(dp[i]));         }                  BigDecimal aa = new BigDecimal(0);         for (int i = 0; i < dp[0].length-1; i++) {             aa = aa.add(new BigDecimal(dp[n-1][i]));         }         BigDecimal bb = new BigDecimal(6);         BigDecimal pow = bb.pow(n);                  aa = pow.subtract(aa);         BigDecimal gcd = gcd(pow, aa);         return aa.divide(gcd).toString()+"/"+pow.divide(gcd).toString();     }     public static BigDecimal gcd(BigDecimal aa, BigDecimal bb) {          if (bb.toString().equals("0"))             return aa ;         else{             BigDecimal[] divideAndRemainder = aa.divideAndRemainder(bb);             return gcd(bb, divideAndRemainder[1]);         }     } } //被bigdecimal搞惨了