\x09 \x09 \x09 \x09\x09\x09 \x09 \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:
push +1(1b) mark null dup dup getc retr dup push +10(4b) swap sub jneg +0(0b) swap push +2(2b) mod puti dup dup putc mark +0(0b) add push +1(1b) add jump null