tên challenge : Rhaaah SH-T again mô tả: A new dat...

tên challenge : Rhaaah SH-T again
mô tả: A new data leak appeared on the dark web qnd it targets THBank...

Fortunately, the bank said that the cards were "highly securely encrypted". But, is this real ? The flag is the SUM of each UNIQUE card number unencrypted in the format THC{...}, for instance if the sum is 42 then the flag is THC{42}.
solve challenge