#include <stdio.h>

int main() {
	char flag[] = { "0111110" };
	char c, cPrev = 0;
	int k = 1;
	while (scanf("%c", &c)>0)
	{
		if ('1' == c && cPrev == '1')
			k++;
		else if ('1' == c)
			k = 1;
		else
			k = 0;
		if (5 == k) {
			k = 0;
			printf("%c", c);
			printf("%c", '0');
		}
		else {
			printf("%c", c);
		}
		cPrev = c;
	}
	return 0;
}