# include <stdio.h>
# include <string.h>
# define MAXN 80
/** elegxos gia email **/

int checkEmail(char x[])
{
	int posAt=-1;
	int countAt=0;
	int i;
	if(strlen(x)<4) return 0;
	for(i=0;i<strlen(x);i++)
	{
		if(x[i]=='@') 
		{
			posAt=i;
			countAt++;
		}
	}
	if(countAt!=1) return 0;
	if(posAt==0 || posAt==strlen(x)-1) return 0;
	return 1;
}

int main()
{
	char x[MAXN];
	int k;
	printf("Doste email gia elegxo ?\n");
	scanf("%s",x);
	k=checkEmail(x);
	if(k) printf("Einai email \n");
	else printf("Den einai email \n");
	return 0;
}