char*p,*s,a[];main(f,c){for(;gets(p=c);printf(*a?"failed at: %s\n":"yes\n",f?"EOL":p))for(s=a;*p%4%3?f=*p*3/ *--s==3:(*s++=*p);p++);}
Note that non-ascii characters in the above source code will be escaped (such as \x9f).
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