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PUNCHCARD

I found this old punchcard

it seems to be classified

can you figure out what's on there?

punchcard.png

Simply use a punchcard reader online Virtual Card Read-Punch

Response :

THE FLAG IS BRIXELCTF(M41NFR4M3) -- THANK YOU FOR PLAYING BRIXELCTF --

flag : BRIXELCTF(M41NFR4M3)