i,s="zero\x00one\x00two\x00three\x00four\x00five\x00six\x00seven\x00eight\x00nine\x00ten\x00eleven\x00twelve\x00thir\x00for\x00fif\x00six\x00seven\x00eigh\x00nine";main(a,b,j){for(b="\x00twen";i<101;puts(i++>99?"one hundred":i>13?printf(i>20?j?"%sty ":b:i-15?a:s+19,b=j?b:i-31?index(b,0)+1:s+68),i>20?j?a:"ty":"teen":a))j=i%10,a=i==10|j?index(a,0)+1:s;}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).