\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:
mark +1(1b) push +0(0b) dup getc retr dup push +58(6b) sub push +10(4b) swap jzero +0(0b) pop mark +0(0b) putc jump +1(1b)