////////////////////////////////////////// PROBLEM - A //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    int n, k;
    cin >> n >> k;
    char c = 'a';
    for (int i = 0, j = 1; i < n; i++, j++) {
        cout << c;
        if (j % k == 0) c = 'a';
        else c++;
    }
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - B //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    int k, r;
    cin >> k >> r;
    for (int i = 1; i <= 10; i++) {
        int x = i * k;
        if (x % 10 == r || x % 10 == 0) {
            cout << i;
            break;
        }
    }    
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - C //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    int n;
    string s;
    cin >> n >> s;
    int anton = 0;
    int danik = 0;
    for (int i = 0; s[i]; i++) {
        if (s[i] == 'A') anton++;
        else danik++;
    }
    if (anton > danik) cout << "Anton";
    else if (anton < danik) cout << "Danik";
    else cout << "Friendship";
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - D //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    int n;
    cin >> n;
    int a[n + 1];
    for (int i = 1; i <= n; i++) {
        cin >> a[i];
    }
    int score0 = 0, score1 = 0;
    bool player = 0;
    for (int i = 1, j = n; i <= j; player = 1 - player) {
        int mx;
        if (a[i] >= a[j]) {
            mx = a[i];
            i++;
        }
        else {
            mx = a[j];
            j--;
        }
        if (player == 0) score0 += mx;
        else score1 += mx;
    }
    cout << score0 << ' ' << score1;
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - E //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    string s1, s2;
    cin >> s1 >> s2;
    for (int i = 0; s1[i]; i++) {
        s1[i] = tolower(s1[i]);
        s2[i] = tolower(s2[i]);
    }
    if (s1 == s2) cout << 0;
    else if (s1 > s2) cout << 1;
    else cout << -1;
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - F //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    int n;
    cin >> n;
    int a[n + 1][2];
    for (int i = 1; i <= n; i++) {
        cin >> a[i][0] >> a[i][1];
    }    
    int ans = 0;
    for (int i = 1; i <= n; i++) {
        for (int j = i + 1; j <= n; j++) {
            if (a[i][0] == a[j][1]) ans++;
            if (a[i][1] == a[j][0]) ans++;
        }
    }
    cout << ans;
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}



////////////////////////////////////////// PROBLEM - G //////////////////////////////////////////
#include <bits/stdc++.h>
#define ll long long
using namespace std;

void solve()
{
    string s1, s2;
    cin >> s1 >> s2;
    int i = 0;
    for (int j = 0; s2[j]; j++) {
        if (s1[i] == s2[j]) i++;
    }
    cout << i + 1;
}

int main()
{
    int t = 1;
    // cin >> t;
    for (int i = 1; i <= t; i++)
    {
        solve();
    }
    return 0;
}