\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 +10(4b) dup dup dup getc retr dup putc sub jzero +0(0b) jump null mark +0(0b) geti jump null