#include <stdio.h>
void main(void) {
	int i=0;
	for (i=0; i<20; i++) {
		switch(i) {
			case 0:i+=5;
			case 1:i+=2;
			case 5:i+=5;
			default:i+=4;
			break;
}
			printf("%d,",i);
		}
}