#include "stdafx.h"
int addition(int i,int j)
{
	int p,q;
	p=i^j;
	q=i&j;
	if(q)
	{
		q<<=1;
		return addition(p,q);
	}
	return p;
}

int main()
{
	int i,j;
	char s;
	scanf("%d",&i);
	while(scanf("%c%d",&s,&j)!=EOF)
	{
		i=addition(i,j);
		printf("%d\n",i);
	}
}