void solve() throws IOException {
		char[] s = "qwertyuiopasdfghjklzxcvbnm".toCharArray();
		int n = rI();
		int m = rI();
		int r1 = 0;
		int r2 = 0;
		while(r1<n){
			out.print(s[r2]);
			r2++;
			r1++;
			if(r2==m){
				r2=0;
			}
		}
		
	}