#include <cstdio>
#include <cstring>
#include <string>
using namespace std;

FILE *fin;
FILE *fout;

bool chkEmail( char x[], int sp )
{
//	printf( "ICH %s%d\n", x, sp );
	while ( ( (unsigned) sp < strlen( x ) ) && ( ( x[sp] == ' ' ) || ( x[sp] == '\n' ) || ( x[sp] == ',' ) ) )
	{
		sp++;
	}
	if ( (unsigned) sp >= strlen( x ) ) return 1;
//	printf( "CH %s%d\n", x, sp );
	bool f;
	f = 0;
	while ( ( x[sp] != '@' ) && ( (unsigned) sp < strlen( x ) ) )
	{
		if ( x[sp] != '.' )
		{
			if ( x[sp] < 'a' || x[sp] > 'z' )
				return 0;
		}
		f = 1;
		sp++;
	}
	if ( f == 0 ) return 0;
	if ( x[sp] != '@' ) return 0;
	f = 0;
	sp++;
	while ( ( x[sp] != '.' ) && ( (unsigned) sp < strlen( x ) ) )
	{
		if ( x[sp] != '.' )
		{
//			printf( "NONONO %d %c\n", sp, x[sp] );
			if ( x[sp] < 'a' || x[sp] > 'z' )
				return 0;
		}
		f = 1;
		sp++;
	}
//	printf( "END?! %d %d %c\n", f, sp, x[sp] );
	if ( f == 0 ) return 0;
	if ( x[sp] != '.' ) return 0;

	f = 0;
	sp++;
	while ( ( x[sp] != ',' ) && ( (unsigned) sp < strlen( x ) ) )
	{
		if ( x[sp] == ' ' ) break;
		if ( x[sp] == '\r' ) break;
		if ( x[sp] == '\n' ) break;
		if ( x[sp] != '.' )
		{
//			printf( "NONONO %d %c\n", sp, x[sp] );
			if ( x[sp] < 'a' || x[sp] > 'z' )
				return 0;
		}
		f = 1;
		sp++;
	}
	if ( f == 0 ) return 0;
//	printf( "END?!\n" );
	return chkEmail( x, sp );
}

char from[1000000];
char to[1000000];
char cc[1000000];
char bcc[1000000];
char atta[1000000];
char subj[1000000];
char body[1000000];

bool es()
{
	int i;
	for ( i = 8; (unsigned)i < strlen( subj ); i++ )
	{
		if ( ( subj[i] != ' ' ) && ( subj[i] != '\n' ) && ( subj[i] != '\r' ) )
			return 0;
	}
	return 1;
}

bool ea()
{
	int i;
	for ( i = 8; (unsigned)i < strlen( atta ); i++ )
	{
		if ( ( atta[i] != ' ' ) && ( atta[i] != '\n' ) && ( atta[i] != '\r' ) )
			return 0;
	}
	return 1;
}

bool eb()
{
	int i;
	for ( i = 5; (unsigned) i < strlen( body); i++ )
	{
		if ( ( body[i] != ' ' ) && ( body[i] != '\r' ) && ( body[i] != '\n' ) )
		{
			if ( body[i] == '-' )
			{
				if ( (unsigned)i + 5 < strlen( body ) )
					return 0;
			}
			else return 0;
		}
	}
	return 1;
}

bool ES( char x )
{
	if ( ( x == ' ' ) || ( x == '\r' ) || ( x == '\n' ) )
		return 1;
	return 0;
}

bool lb()
{
	int i;
	for ( i = 5; (unsigned) i < strlen( body); i++ )
	{
		if ( ES( body[i] ) && ES( body[i-1] ) && ( body[i-1] != '\r' ) )
		{
			if ( ( body[i] == '\r' || body[i] == '\n' ) && (body[i-1] == '\r' || body[i-1] == '\n') )
			{
				if ( ( body[i-2] == '\r' || body[i-2] == '\n' ) && (body[i-3] == '\r' || body[i-3] == '\n') )
					if ( ( body[i-4] == '\r' || body[i-4] == '\n' ) )
						return 1;
			}
			else return 1;
		}
	}
	return 0;
}

void readAtta()
{
	char x[1000000];
	atta[0] = '\0';
	do
	{
		if ( fgets( x, 1000000, fin ) != NULL )
			strcat( atta, x );
		else break;
	}
	while ( strlen( x ) > 1 );
}

int main()
{
	fin = fopen( "email.in", "r" );
	fout = fopen( "email.out", "w" );
	
	fgets( from, 1000000, fin );
	fgets( to, 1000000, fin );
	fgets( cc, 1000000, fin );
	fgets( bcc, 1000000, fin );
	readAtta();
//	printf( "DOTUK?!\n" );
	fgets( subj, 1000000, fin );
//	printf( "MINA!\n" );
	char x;
	int la = 0;
	while ( fscanf( fin, "%c", &x ) == 1 )
	{
//		printf( "AAA!\n" );
		body[la++] = x;
	}
	body[la] = '\0';
	
//	printf( "%s", from );
//	printf( "%s", to );
//	printf( "%s", cc );
//	printf( "%s", bcc );
//	printf( "%s", atta );
//	printf( "%s", subj );
	
	if ( strlen( from ) <= 6 )
	{
		fprintf( fout, "1\n" );
		return 0;
	}
	else if ( ( strlen( to ) <= 4 ) && ( strlen( cc ) <= 4 ) && ( strlen( bcc ) <= 5 ) )
	{
		fprintf( fout, "2\n" );
		return 0;
	}
	else if ( ( chkEmail( from, 5 ) == 0 ) || ( chkEmail( to, 3 ) == 0 ) || ( chkEmail( cc, 3 ) == 0 ) || ( chkEmail( bcc, 4 ) == 0 ) )
	{
//		printf( "%d %d %d %d\n", chkEmail( from, 5 ), chkEmail( to, 3 ), chkEmail( cc, 3 ), chkEmail( bcc, 4 ) );
		fprintf( fout, "3\n" );
		return 0;
	}
	else if ( es() )
	{
		fprintf( fout, "100\n" );
		return 0;
	}
	else if ( eb() )
	{
		fprintf( fout, "101\n" );
		return 0;
	}
	else if ( lb() )
	{
		fprintf( fout, "102\n" );
		return 0;
	}
	else if ( ea() && (strstr( body, "attach" ) != NULL) )
	{
		fprintf( fout, "103\n" );
		return 0;
	}
	fprintf( fout, "0\n" );
	
	fclose( fin );
	fclose( fout );
	return 0;
}