#include <bits/stdc++.h>
#include <iostream>

#define fast                          \
    ios_base::sync_with_stdio(false); \
    cin.tie(0);                       \
    cout.tie(0);

#define ll long long int
#define put push_back 
#define stop return 0
#define vint vector<int>
#define vs vector<string>
#define vll vector<long long int>
#define YES cout<<"YES"<<"\n"
#define NO cout<<"NO"<<"\n"
using namespace std;

int main(){
    fast;
    long long int t=1;
    cin >> t;
    while(t--)
    {
        string s;
        cin >> s;
        int n=s.length();
        if(s.length()==1 && s!="a") NO;
        else if(s.length()==1 && s=="a") YES;
        else if(s.length()==2){
            if(s=="ab" || s=="ba") YES;
            else NO;
        }
        else if(s.length()==3){
            if(s=="abc" || s=="cba" || s=="cab" || s== "bac") YES;
            else NO;
        }
        else{
            set<char> check;
            bool alpha=false;
            for(int i=0;i<s.length();i++){
                check.insert(s[i]);
                if(check.size()==s.length()){
                    int sum=0;
                    for(int i=0;i<check.size();i++) sum+= s[i]-'a'+1;
                    
                    if(sum==(n*(n+1))/2){ alpha=true; break;}
                }


            }
            if(alpha){
            for(int i=1;i<s.length()-1;i++){
                int x= s[i-1]-'a';
                int y= s[i]-'a';
                int z=s[i+1]-'a';
                if(y>x && y>z) {alpha=false; break;}
                
            }
            }
            if(!alpha) NO;
            else YES;

        }

    }
    
    
    stop;
}