4b

int main()
{
    char a[40];
    int b,c,d,e,max;
    b=c=d=e=max=0;
    cout << "vvedite stroku: ";
    cin.getline(a,40);
    while (a[b]!='\0')
    {
        while (a[b]>='A' && a[b]<='Z' || a[b]>='a' && a[b]<='z')
        {
            b=b+1;
            c=c+1;
            d=b;
        }
        if (c>max)
        {
            max=c;
            e=d-max;
        }
        c=0;
        b=b+1;
    }
   while (c<max)
   {
       cout << a[e];
       e=e+1;
       c=c+1;
   }
}