{}
import java.util.*;
class Pattern {
public static void main(String[] args)
{
Scanner sc= new Scanner(System.in);
System.out.println("enter the n and m=");
int n=sc.nextInt();
int m=sc.nextInt();
for(int i=1; i<=n; i++){
for(int j=1; j<= m; j++){
System.out.print((char)(j+96)+" ");
}
System.out.println();
}
}
}