diff1.c

fuck() { for (void;;sizeof(char)){{{;
do {} while(({break;sizeof(char);}));
return sizeof(char)+sizeof(char);}}};
return sizeof(char)-sizeof(char);{}};
              char*s="gcc\0clang";
main() { puts(fuck() + s + fuck());};

diff2.c

or() {for(;;
or()){for(;;
({break;}));
return 4|4;}
return 0|0;}

main() {puts(or()
+"gcc\0clang");};

diff3.c

and() {for(;;
and()){for(;;
({break;}));;
{return 4;};;
}return 0;};;

main(){puts(and()+"gcc\0clang");}

diff4.c

and() {for(;;
and()){for(;;
({break;}));;
{return 0;};;
}return 1;};;
int main(){;;
int*x[]={({;;
0;}),"gcc"};;
0;x[0]=({{};;
"\clang";});;
int*or=x+({;;
and()>>1;});;
or=x[and()];;
puts(or);;};;