#include <iostream>
using namespace std;
int main() {
ios::sync_with_stdio(0);
int i,T,N,g,r;
cin>>T;
while(T--){
cin>>N;
r=N%26;
g=(N-r)/26;
char a[26]={'a','b','c','d','e','f','g','h','i','j','k','l','m','n','o','p','q','r','s','t','u','v','w','x','y','z'};
for(i=0;i<g;i++)
cout<<a;
for(i=0;i<r;i++){
cout<<a[i];
}
cout<<endl;
}
return 0;
}
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