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0x42
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0x42 is an esolang by User:None1 and inspired by HQ9+B and +.
The author named it 0x42 because the name "B" is already taken by another esolang.
Command
It has only one command: B, which reads input and interpret it as brainfuck. It is forwards compatible with HQ9+B. It is also ℒ-complete.
Examples
brainfuck interpreter
B