#import <Foundation/Foundation.h>

int main(int argc, const char * argv[]) {
    NSAutoreleasePool *pool = [[NSAutoreleasePool alloc] init];
    int n;
    scanf("%i",&n);
    
    char* password_temp = (char *)malloc(n * sizeof(char));
    scanf("%s",password_temp);
    NSString* password = [NSString stringWithFormat:@"%s", password_temp];
    
    /*
    NSString *numbers = @"0123456789";
    NSString *lower_case = @"abcdefghijklmnopqrstuvwxyz";
    NSString *upper_case = @"ABCDEFGHIJKLMNOPQRSTUVWXYZ";
    NSString *special_characters = @"!@#$%^&*()-+";
    */
    
    NSCharacterSet *set = [NSCharacterSet decimalDigitCharacterSet];
    BOOL needNumber = ([password rangeOfCharacterFromSet:set].location == NSNotFound);

    NSCharacterSet *set2 = [NSCharacterSet characterSetWithCharactersInString: @"abcdefghijklmnopqrstuvwxyz"];
    BOOL needLowerCase = ([password rangeOfCharacterFromSet:set2].location == NSNotFound);
    
    NSCharacterSet *set3 = [NSCharacterSet characterSetWithCharactersInString: @"ABCDEFGHIJKLMNOPQRSTUVWXYZ"];
    BOOL needUpperCase = ([password rangeOfCharacterFromSet:set3].location == NSNotFound);
    
    NSCharacterSet *set4 = [NSCharacterSet characterSetWithCharactersInString: @"!@#$%^&*()-+"];
    BOOL needSpecial = ([password rangeOfCharacterFromSet:set4].location == NSNotFound);
    
    NSUInteger count = 0;
    if (needNumber) {
        count++;   
    }
    if (needLowerCase) {
        count++;   
    }
    if (needUpperCase) {
        count++;   
    }
    if (needSpecial) {
        count++;   
    }
    
    if (n < 6 - count) {
        count = 6 - n;
    }
        
    
    
    printf("%li\n", count);
    
    [pool drain];
    return 0;
}