Any suggestion about how to generate a random seed code 81 chars long?
Use

to generate chars one by one.
To generate a single char throw the die 3 times, each time write down
0 (for 1 point and 2 points),
1 (3 points, 4 points) or
2 (5 points, 6 points). Then take the number which is FIRST_VALUE + SECOND_VALUE * 3 + THIRD_VALUE * 9. If the result is 0 then take "9", otherwise take the corresponding letter of the Latin/English alphabet.
PS: Make sure it's a fair die, not one from the set of magic tricks.