wrong timus 1893

#include<iostream>
#include<string>
#include<cstdlib>
#include<cstring>
using namespace std;
int main() {
    int k[2];
    string a;
    cin >> a;
    if (a.length() == 2) {
        for (int i = 0; i < 2; i++) {
            k[i] = a[i] - '0';
        }
        int u = k[0] * 10 + k[1];
        if (u < 21) {
            if (a[2] == 'A' || a[1] == 'F')
                cout << "window";
            else cout << "aisle";
        }
        else {
            if (a[2] == 'A' || a[2] == 'K')
                cout << "window";
            else if (a[2] == 'C' || a[2] == 'D' || a[2] == 'G' || a[2] == 'H')
                cout << "aisle";
            else cout << "neither";
        }
    }

    else {
        k[0] = a[0] - '0';
        if (k[0] < 3) {
            if (a[1] == 'A' || a[1] == 'D')
                cout << "window";
            else cout << "aisle";
        }
        else {
            if (a[1] == 'A' || a[1] == 'F')
                cout << "window";
            else cout << "aisle";
        }
    }
    system("pause");
}