/* vis:  make funny characters visible (version 1) */

#include <stdio.h>
#include <ctype.h>

main()
{
	int c;

	while ((c = getchar()) != EOF)
		if (isascii(c) &&
		    (isprint(c) || c=='\n' || c=='\t' || c==' '))
			putchar(c);
		else
			printf("\\%03o", c);
	exit(0);
}