#include <stdio.h>

main ()
{
	auto char buf[128];
	register int ch;
	register int packed;
	register char *scan;

	while (gets (buf)) {
		for (scan = buf; *scan != '\000'; ) {
			ch = *scan++;
			if (ch > '9') {
				packed = (ch - '7') << 4;
			} else {
				packed = (ch - '0') << 4;
			}
			ch = *scan++;
			if (ch > '9') {
				packed |= (ch - '7');
			} else {
				packed |= (ch - '0');
			}
			putchar (packed);
		}
	}
}