\x09 \x09 \x09 \x09\x09\x09 \x09\x09 \x09\x09 \x09 \x09 \x09\x09 \x09 \x09\x09
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
Disassemble:
mark null push +32(6b) dup dup getc retr dup push +51(6b) sub jneg null puti putc jump null