//usr/bin/gcc "$0" && ./a.out < inFile.txt 1> evenFile.txt 2> oddFile.txt; rm a.out; exit
#include <stdio.h>

int main() {
	int n;
	while (scanf("%d", &n) != EOF && n != 0) {
		fprintf((n%2) ? stderr : stdout, "%d\n", n);
	}
	return 0;
}