#include <stdio.h>
#include <string.h>
#include <stdbool.h>

enum color{
	color_black = 0,
	color_red = 0xff0000,
	color_green = 0x00ff00,
	color_blue = 0x0000ff,
	color_yellow = color_red | color_green,
	color_magenta = color_red | color_blue,
	color_cyan = color_green | color_blue
};

bool str_to_color(const char *colname, enum color *colval){
	if(!strcmp(colname, "black")){
		*colval = color_black;
		return true;
	}
	if(!strcmp(colname, "red")){
		*colval = color_red;
		return true;
	}
	if(!strcmp(colname, "green")){
		*colval = color_green;
		return true;;
	}
	if(!strcmp(colname, "blue")){
		*colval = color_blue;
		return true;
	}
	if(!strcmp(colname, "yellow")){
		*colval = color_yellow;
		return true;
	}
	if(!strcmp(colname, "magenta")){
		*colval = color_magenta;
		return true;
	}
	if(!strcmp(colname, "cyan")){
		*colval = color_cyan;
		return true;
	}
	return false;
}

int main(void) {
	enum color col;
	char buff[64];
	while(scanf("%63s ", buff) == 1){
		if(str_to_color(buff, &col)){
			printf("%#08x\n", col);
		}
		else{
			puts("Wrong color.");
		}
	}
	return 0;
}