a.c

#define IF if(
#define THEN )
#define BEGIN {
#define END }

#define PRINT printf
#define GROUP (
#define ENDGROUP )
#define NEXT ;

#define COUNT for (
#define WITH int
#define FROM =
#define UPTO ; i <
#define DO ; i++ )

#include <stdio.h>

int main() {
	COUNT WITH i FROM 0 UPTO 10 DO BEGIN
		IF i % 2 == 0 THEN BEGIN
			PRINT GROUP "%d: Hello World!\n", i ENDGROUP
		NEXT END
	NEXT END
}