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

int to_decimal(int val)
{
	if (val >= '0' && val <= '9') return val - '0';
	if (val >= 'A' && val <= 'F') return val - 'A' + 10;
	if (val >= 'a' && val <= 'f') return val - 'a' + 10;
	return -1;
}

int main()
{
	int val, char1, char2, val1, val2;
	
	while ((val = fgetc(stdin)), !feof(stdin))
		if (val == '%') {
			char1 = fgetc(stdin);
			
			if (feof(stdin)) {
				fprintf(stdout, "%%%c", char1);
				break;
			}
			
			char2 = fgetc(stdin);
			
			val1 = to_decimal(char1);
			val2 = to_decimal(char2);
		
			if (val1 < 0 || val2 < 0)
				fprintf(stdout, "%%%c%c", char1, char2);
			else
				fputc(val1 * 16 + val2, stdout);
		}
		else
			fputc(val, stdout);
	return 0;
}