like what someone said, the numbers r limited to the
following:
0, 9, 17, 18, 27, 36, 45, 54, 63, 71, 72
and although the symbols for these numbers change regularly, the
rest of the symbosl for other numbers remain the same. every round,
all the program needs to do is to show u the symbol it has choosen
to represent the above numbers, and since u're likely to have
choosen another number u don't notice that the symbol has changed
for your previous answer and u think that the symbol for the next
answer u've choosen is unique to it.