F,fst;
F,snd;
F,hd;
F,tl;
F,readLine;
F,stringcat;
F,matchSubString;
F,substring;
F,regexp;
F,regexpMatch;
F,sprintf;
F,makeString;
F,printf;
F,fprintf;
F,fopen;
F,fclose;
F,fread;
F,fwrite;
F,failure;
F,read;
F,write;
F,compare;
F,i__Infix_4343;
L,"++",T,"+";