#include <bits/stdc++.h>
using namespace std;
int main() {
int t;
cin>>t;
while(t--)
{
int i,k,ch=65,l=0,o=0,count1=0,count2=0,nn[101],nnn[101];
cin>>k;
if(k<26){
for(i=97+k;i>=97;--i) printf("%c",i);
printf("\n");
}
else{
while(k>=26) {for(i=122;i>=97;--i) {nn[l++]=i,++count1;}k-=25;}
if(k<26) {for(i=97+k;i>=97;--i) {nnn[o++]=i,++count2;}}
for(i=0;i<count2;++i) printf("%c",nnn[i]);
for(i=0;i<count1;++i) printf("%c",nn[i]);
printf("\n");
}
}
return 0;
}
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