Escape Room - Envelope 2 - Canisters Clue 3

Two canisters go to a container with #3, two canisters to #1 and two to a container with #2 on it.  But which letters should you look for?

Still not sure what the answer is?

Click here if you need more help with canister #3...

Click here if you need more help with canister #1...

Click here if you need more help with canister #2...

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