/* Copyright 2019-2021 DistressNetwork° <uplink@distress.network>
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */

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

int main() {
	char str[2048];
	char safe[] = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz1234567890-._~";
	char *ret;
	int i;

	scanf("%[^\n]", str);
	int length = strlen(str);

	for(i = 0; i < length; i++) {
		ret = strchr(safe, str[i]);
		if(ret == NULL) {
			printf("%%%02X", (unsigned)str[i] & 0xffU);
		} else {
			printf("%c", str[i]);
		}
	}
	printf("\n");
	return 0;
}