l,i,j,s;\x0d char a[9999];\x0d main(){\x0d l=strlen(gets(a+2));\x0d for(i=0;i<l+2;++i){\x0d for(s=j=0;j<3;++j)\x0d s+=(a[i+2-j]=='#')?pow(2,j):0;\x0d a[i]=(30>>s&1)?'#':' ';\x0d }\x0d puts(a);\x0d }\x0d
Note that non-ascii characters in the above source code will be escaped (such as \x9f).