According to the substitution cipher, each letter:	ABCDEFGHIJKLMNOPQRSTUVWXYZ
	↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓ ↓
is encoded using the corresponding letter in the key:

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(Use all capital letters for now!)