main()
{
	char x[20];
	char s[20];
	strcpy(s,"ste");
	strcpy(x,"ven");

	int i = 0
	int j = 0;
	while(s[i] != '\0')
		i++;

	while(x[j] != '\0'){
		s[i] = x[j];
		j++;
		i++;
	}
	s[i] = '\0';

}