#include<stdio.h>
#include<string.h>
int main()
{
    int no;
    int i;
    int count=0;
    char password[100];
    scanf("%d",&no);
    printf("\n");
    scanf("%s",password);
    if(strlen(password)>=6)
    {
        for(i=0;i<'\0';i++)
        {
            if(password[i]>='a'&&password[i]<='z')
            {
                   if(password[i]>='A'&&password[i]<='Z')
                   {
                       if(password[i]>=0&&password[i]<=127)
                       {
                         if(password[i]>='0'&&password[i]<='9')
                           printf("strong");
                          else
                              count++;
                       }
                       else
                           count++;
                   }
                else
                count++;
            }
             else
                 count++;
        }
        
    }
    

    return 0;
}