Save Ironman

#include<iostream>
#include<string>
#include<cctype>
using namespace std;

bool chack(char a){
    if(isalpha(a)) return 1;
    if(isdigit(a)) return 1;
    else return 0;
}

int main(){
    int t; cin >> t;
    cin.ignore();
    while(t--){
        string s;
        getline(cin, s);
        //cout << s << endl;
        string r;
        for(int i = 0; i < s.length(); i++){
            if(chack(s[i])){
                r += tolower(s[i]);
            }
        }
        //cout << r << endl;
        int j = r.size() - 1, i = 0;
        int flag = 1;
        while(i < j){
            if(r[i] != r[j]){
                flag = 0;
                break;
            }
            i++; j--;
        }
        if(flag) cout << "YES\n";
        else cout << "NO\n";
    }
}