\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:
push +32(6b) mark null dup dup getc retr putc mark +0(0b) dup dup dup getc retr sub jzero null jump +0(0b)