#include<stdio.h>

void print_permission(char p){
	if(p & 4)
		printf("r");
	else
		printf("-");

	if(p & 2)
		printf("w");
	else
		printf("-");

	if(p & 1)
		printf("x");
	else
		printf("-");
}

int main(){
	char p = 5;

	print_permission(p);
	puts("");

	print_permission(7);
	print_permission(5);
	print_permission(2);
	puts("");

	int num = 1;
	for(int i = 0; i < 33; i++){
		printf("num = %d\n", num);
		num = num << 1;
	}


	

	return 0;
}