6 6
 1 4
 4 4
 3 3
 6 4
 6 3
 5 4
 5 6
 3 4
 1 3
 3 2
 5 5
 1 1
 2 1
 3 1
 3 5
 1 6
 6 5
 2 3
 4 3
 2 2
 3 6
 1 2
 6 1
 2 5
 4 5
 1 5
 6 2
 4 6
 5 1
 4 1
 5 2
 2 4
 2 6
 5 3

1/6
 1/2
 1/2
 2/3
 1/6
 1/6
 1/3
 1/6
 1/2
 2/3
 2/3
 1/3
 1/1
 5/6
 2/3
 1/3
 1/6
 1/6
 2/3
 1/2
 5/6
 1/6
 5/6
 1/6
 1/3
 1/3
 1/3
 1/6
 1/6
 1/3
 1/2
 1/3
 1/2
 1/6
 1/3

"use strict";

let arr = readline()
  .split(" ")
  .map((e) => parseInt(e));

let target, probability, res;

if (arr[0] <= arr[1]) {
  target = arr[1];
} else {
  target = arr[0];
}

probability = 6 - target + 1;

switch (probability) {
  case 1:
    res = "1/6";
    break;

  case 2:
    res = "1/3";
    break;

  case 3:
    res = "1/2";
    break;

  case 4:
    res = "2/3";
    break;

  case 5:
    res = "5/6";
    break;

  case 6:
    res = "1/1";
    break;
}

print(res);
