//   https://101010.pl/@nabijaczleweli/113081938079382839
//   Drive as
// csplit -f .SPLIT xx0420 '/^$/'
// { sed '/Content-Transfer-Encoding:/s/8bit/quoted-printable/' < .SPLIT00;
//   ./.fix < .SPLIT01; } > xx0420f
#include <stdio.h>
int main() {
	for(int c; (c = getchar()) != EOF;)
		if(c < 0x80 && c != '=')
			putchar(c);
		else
			printf("=%02X", c);
}