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c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
 
int main(void) {
	f("bBaAdD");
	puts("");
	f("NniIcCeE");
	puts("");
	f("Tt eE Ss tT");
	puts("");
	f("sS Ee tT");
	puts("");
	f("1!1!1sStT!");
	puts("");
	f("nN00bB");
	puts("");
	f("(eE.gG.)");
	puts("");
	f("Hh3lL|@!");
	puts("");
 
	f("aAa"); // aa
	puts("");
	f("aA"); // a
	puts("");
	f("Aaa"); // Aa
	puts("");
	f("aaaAAA"); // aaaAA
	puts("");
 
	f("AA"); // AA
	puts("");
	f("AB"); // AB
	puts("");
	return 0;
}
 

prog.c:2:1: warning: data definition has no type or storage class
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
 ^
prog.c:2:1: warning: type defaults to 'int' in declaration of 'c' [-Wimplicit-int]
prog.c:2:3: warning: data definition has no type or storage class
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
   ^
prog.c:2:3: warning: type defaults to 'int' in declaration of 'd' [-Wimplicit-int]
prog.c:2:5: warning: return type defaults to 'int' [-Wimplicit-int]
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
     ^
prog.c: In function 'f':
prog.c:2:19: warning: implicit declaration of function 'putchar' [-Wimplicit-function-declaration]
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
                   ^
prog.c:2:32: error: expected ';' before ')' token
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
                                ^
prog.c:2:32: error: expected expression before ')' token
prog.c:2:36: warning: implicit declaration of function 'isalpha' [-Wimplicit-function-declaration]
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
                                    ^
prog.c:2:34: warning: operation on 's' may be undefined [-Wsequence-point]
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
                                  ^
prog.c: In function 'main':
prog.c:6:2: warning: implicit declaration of function 'puts' [-Wimplicit-function-declaration]
  puts("");
  ^
prog.c: In function 'f':
prog.c:2:32: warning: control reaches end of non-void function [-Wreturn-type]
 c;d;f(char*s){for(putchar(c=*s))s+=isalpha(c)*(d=*++s)&&(!((c^d)&95)&&c^d);}
                                ^

Standard output is empty