Fully functional Brainf*ck interpreters have been done before, but I've only seen it as a golf problem - not intentional obfuscation. So here it is: my first attempt at a JAPH.

$/=$u;$_=<DATA>;y;-<[.]>+;;cd;s:.:($t=qw=while%{ ++$p %||last} %}++
++% %-- --% print(chr%) --$p=[ord($&)%13%9])=~s'%'($m[$p])';"$t;\n"
:gex;eval __DATA__
,>>++++[>++++++++<-]+++++++++++[>>+++++++++++<<-]++++++++++[>>>++++
++++++<<<-]++++++++[>>>>+++++++++<<<<-]>>>>++.<<----.--.+.<.>>---.<
------.+.+++++.>+++++++.---.<--.<.>>>++++++.<.<.>+++++++.<<.>>----.
-------.++.++++++++.------.<.<++++++++++++.<<++++++++++.

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In reply to Functional Brainf*ck JAPH by nightwatch

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