#include <iostream>

using namespace std;
char c;
int cifra,up,lou,special,n,nr;
void up1()
{
    for(char i='A';i<='Z';++i) if(c==i) up=1;
}
void lou1()
{
    for(char i='a';i<='z';++i) if(c==i) lou=1;
}
void cifra1()
{
    for(char i='0';i<='9';++i) if(c==i) cifra=1;
}
void special1()
{
    if(c=='!') special=1;
    if(c=='@') special=1;
    if(c=='#') special=1;
    if(c=='%') special=1;
    if(c=='^') special=1;
    if(c=='&') special=1;
    if(c=='*') special=1;
    if(c=='(') special=1;
    if(c==')') special=1;
    if(c=='-') special=1;
    if(c=='+') special=1;
}
int main()
{
    cin>>n;
    for(int i=1;i<=n;++i)
    {
        cin>>c;
        up1();
        lou1();
        cifra1();
        special1();
    }
    if(up==0) ++nr;
    if(lou==0) ++nr;
    if(cifra==0) ++nr;
    if(special==0) ++nr;
    if(n+nr<6) nr=nr+(6-n-nr);
    cout<<nr;
    return 0;
}