#include <iostream>
#include <string>


using namespace std;


int main()
{
    int n;
    cin>>n;
    int p[n];
    string posi;
    for(int i=0; i<n; i++)
    {
        cin>>posi;
        if ((posi[0]<'a'||posi[0]>'h')||(posi[1]<'1'||posi[1]>'8'))
            return 0;
        if (posi[0]>='c'&&posi[0]<='f')
        {
            if (posi[1]>='3'&&posi[1]<='6')
                p[i]=8;
            if (posi[1]=='2'||posi[1]=='7')
                p[i]=6;
            if (posi[1]=='1'||posi[1]=='0')
                p[i]=4;
        }
        if (posi[0]=='b'||posi[0]=='g')
        {
            if (posi[1]>='3'&&posi[1]<='6')
                p[i]=6;
            if (posi[1]=='2'||posi[1]=='7')
                p[i]=4;
            if (posi[1]=='1'||posi[1]=='8')
                p[i]=3;
        }
        if (posi[0]=='a'||posi[0]=='h')
        {
            if (posi[1]>='3'&&posi[1]<='6')
                p[i]=4;
            if (posi[1]=='2'||posi[1]=='7')
                p[i]=3;
            if (posi[1]=='1'||posi[1]=='8')
                p[i]=2;
        }
    }
    for (int i=0; i<n; i++)
        cout<<p[i]<<endl;

    return 0;
}

hi,in your code you should consider 'a','h',1,8.
 for example :if ((posi[0]<='a'||posi[0]>='h')||(posi[1]<='1'||posi[1]>='8'))