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;
            }
        }

    }