https://codeforces.com/contest/1092/problem/A
题解:
按顺序打字母???
/*
*@Author: STZG
*@Language: C++
*/
#include <bits/stdc++.h>
#include<iostream>
#include<algorithm>
#include<cstdlib>
#include<cstring>
#include<cstdio>
#include<string>
#include<vector>
#include<bitset>
#include<queue>
#include<deque>
#include<stack>
#include<cmath>
#include<list>
#include<map>
#include<set>
//#define DEBUG
#define RI register int
using namespace std;
typedef long long ll;
//typedef __int128 lll;
const int N=10000;
const int MOD=1e9+7;
const double PI = acos(-1.0);
const double EXP = 1E-8;
const int INF = 0x3f3f3f3f;
int t,n,m,k,q;
int main()
{
#ifdef DEBUG
freopen("input.in", "r", stdin);
//freopen("output.out", "w", stdout);
#endif
scanf("%d",&t);
while(t--){
scanf("%d%d",&n,&m);
int e=min(m,26);
q=n/e;
k=n-e*q;
for(int i='a';i<'a'+e;i++){
for(int j=1;j<=q;j++)
printf("%c",i);
if(k>0){
k--;
printf("%c",i);
}
}
printf("\n");
}
//cout << "Hello world!" << endl;
return 0;
}