codeforces1335B

#include<bits/stdc++.h> using namespace std; const int N = 30; char arr[N]; int main(){     int t;     cin>>t;     while(t--){     	int n,a,b;     	cin>>n>>a>>b;     	int x=0;     	for(char i = 'a';i<='z';i++)     		arr[x++]=i;     	for(int i=0,j=0,cnt=0;i<n;j++){     		if(j==n)     			break;     		cout<<arr[i];     		if(i<b-1)     			i++;     		if(cnt==a-1){     			i=0;     			cnt=0;	     		}     		else     			cnt++; 	} 		cout<<endl;     }     return 0; }