void main()
{
	int i;
	char s[30];
	gets(s);
	for(i=0;s[i]!='\0';i++)
	{
		if(s[i]>'0'-1&&s[i]<'9'+1)
		{
			if(s[i+1]>'0'-1&&s[i+1]<'9'+1)
			printf("%c",s[i]);
			else printf("%c\n",s[i]);
		}
	}
}